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Master Your Money With Japanese PrinciplesMaster Your Money With Japanese Principles
Take the quiz to get your personalized plan

Master Your Money With Japanese Principles

The personal finance app for smarter, simpler spending
The personal finance app for smarter, simpler spending
  • Get personalized advice rooted in proven Japanese money rules
  • Track your savings and spending with daily kakeibo-style prompts
  • Cut waste, build better habits, and reach your financial goals
Kei
Created byKei
Japanese-American personal finance expert helping thousands rethink spending and save more with proven Japanese money principles.
Background
Hero image

Your coach

You’re tracking expenses, but impulse purchases are slipping through. Try a daily kakeibo reflection before each buy: ask yourself if you truly need it and how you’ll feel after.

Today's Activity

5 min • Kakeibo Check-In

Continue activity
Take the quiz to get your personalized plan
Achieve your goals

Master your money, the Japanese way

With this app as your personal coach, transform your finances using proven Japanese money principles. Get a custom plan tailored to your habits and goals, daily reflection prompts inspired by kakeibo, and practical advice to help you save more, spend mindfully, and build lasting financial confidence.

Feature image

Nice job!

You crushed your goal of saving $200 extra this month.

psychology

Get expert guidance, every day

Receive personalized coaching and answers to your money questions, all rooted in time-tested Japanese financial wisdom for real-life results.

fact_check

Build mindful money habits

Practice daily kakeibo-style reflection to rethink spending, avoid waste, and make every purchase count—so your money works for you.

trending_up

See your savings grow

Track your progress with clear visuals and celebrate real improvements in your savings, confidence, and financial peace of mind.

The only app you need

A personalized money coach. In your pocket.

This app guides you to financial clarity using proven Japanese money principles. Start by sharing your income, habits, and goals—then get a custom plan that targets your biggest money struggles. Each day, you'll reflect with kakeibo-style prompts, learn practical rules, and chat with your AI coach for real-world advice. Track your savings progress and build habits that last. Everything you need for smarter, simpler money management is here.

Master Your Money With Japanese PrinciplesMaster Your Money With Japanese Principles
Take the quiz to get your personalized plan

Master Your Money With Japanese Principles

The personal finance app for smarter, simpler spending
The personal finance app for smarter, simpler spending
  • Get personalized advice rooted in proven Japanese money rules
  • Track your savings and spending with daily kakeibo-style prompts
  • Cut waste, build better habits, and reach your financial goals
Kei
Created byKei
Japanese-American personal finance expert helping thousands rethink spending and save more with proven Japanese money principles.
Background
Hero image

Your coach

You’re tracking expenses, but impulse purchases are slipping through. Try a daily kakeibo reflection before each buy: ask yourself if you truly need it and how you’ll feel after.

Today's Activity

5 min • Kakeibo Check-In

Continue activity
Take the quiz to get your personalized plan
Achieve your goals

Master your money, the Japanese way

With this app as your personal coach, transform your finances using proven Japanese money principles. Get a custom plan tailored to your habits and goals, daily reflection prompts inspired by kakeibo, and practical advice to help you save more, spend mindfully, and build lasting financial confidence.

Feature image

Nice job!

You crushed your goal of saving $200 extra this month.

psychology

Get expert guidance, every day

Receive personalized coaching and answers to your money questions, all rooted in time-tested Japanese financial wisdom for real-life results.

fact_check

Build mindful money habits

Practice daily kakeibo-style reflection to rethink spending, avoid waste, and make every purchase count—so your money works for you.

trending_up

See your savings grow

Track your progress with clear visuals and celebrate real improvements in your savings, confidence, and financial peace of mind.

The only app you need

A personalized money coach. In your pocket.

This app guides you to financial clarity using proven Japanese money principles. Start by sharing your income, habits, and goals—then get a custom plan that targets your biggest money struggles. Each day, you'll reflect with kakeibo-style prompts, learn practical rules, and chat with your AI coach for real-world advice. Track your savings progress and build habits that last. Everything you need for smarter, simpler money management is here.

Feature showcase

Morning Money Mindset

Expense Reflection

Today's Activity

5 min • Kakeibo Check-In

Start activity

Money Rule Library

Including everything you need to succeed:

psychology

AI money coach chat for instant, practical advice anytime

keyboard_arrow_down

Ask questions and get direct, actionable guidance rooted in Japanese financial wisdom and experience.

assignment_turned_in

Personalized financial plan based on your habits and goals

keyboard_arrow_down

Get a step-by-step plan tailored to your income, spending, and unique money challenges.

auto_stories

Japanese money rules library with clear explanations and steps

keyboard_arrow_down

Explore proven budgeting, saving, and minimalist strategies from Japanese financial philosophy.

question_answer

Daily kakeibo prompts to reflect before every purchase

keyboard_arrow_down

Answer simple questions to build mindful spending habits and avoid wasteful purchases every day.

insights

Progress tracker to visualize your savings growth over time

keyboard_arrow_down

See your savings improve, track habits, and celebrate milestones as you build financial confidence.

fact_check

Spending diagnosis to spot your financial weak points

keyboard_arrow_down

Get a clear breakdown of where your money goes and what’s holding you back from saving more.

check_circle

Actionable steps for every money rule and lesson

keyboard_arrow_down

Turn insights into action with simple, practical steps you can apply right away to your finances.

calendar_today

Flexible check-ins to fit your schedule and keep you accountable

keyboard_arrow_down

Set reminders for daily, weekly, or monthly reviews—so you stay on track without overwhelm.

emoji_objects

Mindset shifts inspired by Japanese minimalist philosophy

keyboard_arrow_down

Learn to value what you have, reduce waste, and focus on what truly matters with every decision.

Created by kei

"After years of blending Japanese and American money habits, I built the coach I wish I had"

Kei

Kei

Japanese-American personal finance expert helping thousands rethink spending and save more with proven Japanese money principles.

Growing up between Japan and the United States, I saw firsthand how differently people approach money—and how much we can learn from both cultures. In Japan, I learned the value of kakeibo budgeting, the wisdom of mottainai (waste nothing), and the power of minimalist money rules. But when I moved to America, I noticed how easy it was to fall into mindless spending and financial stress, even with a good income.

For years, I struggled to find a system that actually worked for my life. I tried every budgeting app and spreadsheet, but nothing stuck. It wasn’t until I returned to my roots—combining Japanese financial philosophies with practical, everyday tools—that I finally started to see real change. My savings grew, my spending became intentional, and I felt genuinely at peace with my money.

I built this app because I know how overwhelming personal finance can feel, especially when advice is either too strict or too vague. My goal is to give you a direct, practical, and encouraging guide—one that diagnoses your unique money habits and helps you build a plan rooted in time-tested Japanese principles.

Every feature in this app comes from my own journey and the lessons I’ve shared with friends, family, and clients. I believe anyone can transform their relationship with money, no matter where they start. My hope is that this app helps you waste less, save more, and finally feel in control of your financial future.

YouTube video
Yen Mind

Follow Kei's proven process & master Japanese money habits

Apply kakeibo budgeting to track spending
Adopt mottainai to reduce financial waste
Set clear, achievable savings goals
Reflect daily with mindful spending prompts
Diagnose and fix your biggest money leaks
Build minimalist money routines that last
Understand Japanese money rules in plain language
Make confident, values-based purchase decisions
Track your savings progress over time
Develop lifelong habits for financial peace
AI-POWERED COACHING

Every single day in the app is 100% personalized to you.

Built with powerful AI, this app is unlike anything you've ever used before. Your entire experience will be designed just for you.

assignment

Kakeibo Reflection: Mindful Spending Check-In

Personalized Practice • 8 min

Reflect on your recent purchases using classic kakeibo questions. This activity helps you build mindful spending habits by connecting your daily choices to your long-term financial goals, all tailored to your unique situation.

What to do
list
Today's Purchases Review
2 min
chevron_right
question_answer
Kakeibo Reflection Questions
3 min
chevron_right
spa
Mottainai Mindset Exercise
2 min
chevron_right
analytics
Savings Progress Snapshot
1 min
chevron_right
How it works

Transform your finances in 4 simple steps

It only takes a few minutes to get started

Onboarding Quiz

What’s your biggest money goal right now?

Save more each month
Stop impulse spending
Stick to a budget that works
Feel less stressed about money
1

Complete the onboarding quiz

Share your income, spending habits, goals, and money struggles so the app can tailor guidance to your unique situation.

Your Plan

Week 1

Foundations of Japanese Money Habits

Set up kakeibo journal
Track daily spending
Identify wasteful habits
Reflect on needs vs. wants
Week 2Upcoming

Applying Minimalist Money Rules

2

Get your personalized plan

Receive a step-by-step plan rooted in Japanese money principles, designed to address your financial weak spots and goals.

Today, June 22

6
V

Morning Money Mindset

Lesson • 3 min

Expense Reflection

Journal • 4 min

Kakeibo Daily Check-In

Activity • 5 min

Money Rule Library

Browse • 6 min

3

Follow daily tasks to stay on track

Check in daily with kakeibo-style prompts and get practical advice from the AI coach to build mindful money habits.

Your Progress

Monthly Savings Rate

82%

as of Jun 15

MarchJune

Wasteful Spending Reduced

32.7 currency

as of Jun 15

MarchJune
4

Track progress & see real results

Watch your savings grow and spending habits improve with clear progress tracking and ongoing encouragement from the app.

It only takes 2 minutes to get started

starstarstarstarstar

Join over 1,000,000 people achieving their goals on Studio

Whatever your goal, find a life-changing app on Studio

Quote

The app is beyond compare!

The app is beyond compare! Best ever! I mean, this is like a Ferrari engine when I'm used to driving a tractor.
D
starstarstarstarstar
Daphne A.
Verified Studio customer
Quote

It's blown my mind

I love the app - it's blown my mind actually. I don't know how you've managed to make it so personalised but congratulations - it's just superb. I love how simple and uncomplicated it is (and very effective).
M
starstarstarstarstar
Martine L.
Verified Studio customer
Quote

The coaching is phenomenal

I use AI every day in my work and I absolutely love the app. The coaching is phenomenal. I've done multiple programs, but this is by far the best experience.
M
starstarstarstarstar
Monica R.
Verified Studio customer
Quote

I'm blown away by the personalization

As I use this app, I'm blown away by the personalization - it feels like it truly understands what I need. I can't say enough positive things about this app; it's been a game changer.
W
starstarstarstarstar
William T.
Verified Studio customer
Quote

Brilliant app! Five stars are not enough!

Brilliant app! Five stars are not enough! I cannot recommend this app more highly!
J
starstarstarstarstar
Jane M.
Verified Studio customer
Quote

This app is everything that I have been looking for

This app is everything that I have been looking for because it feels so personalized. I'm trying to accomplish extraordinary change in my life and that is exactly what I needed. Nothing but positive feedback from me, thank you again!
A
starstarstarstarstar
Amy C.
Verified Studio customer
Quote

Worth every penny

I have been using the app for over a month and it is proving to be worth every penny by providing personalized support, strategies and education in a structured environment that has really helped me to stay focused. It's a phenomenal tool!
T
starstarstarstarstar
Tim P.
Verified Studio customer
Forbes logoABC logoWall Street Journal logoVariety logoTechCrunch logo
FAQ

Your questions, answered

Who is this app for?
expand_more
What will I learn in this app?
expand_more
How much time do I need to dedicate to this app?
expand_more
Is this app suitable for beginners?
expand_more
How personalized is the experience?
expand_more
What kind of support is available?
expand_more
Today's the day

Start transforming your finances with Japanese money wisdom

You’re only minutes away from getting your personalized money coaching plan. Start achieving your financial goals today alongside Kei.

targetYen Mind
6
V

Good evening!

Loading...

list_alt
No activities available for today.
Today
Plan
Progress
Coach
Quick Activity Update
more_horiz
What should I focus on today?
08:56 PM
Today, we'll focus on reviewing your recent spending and practicing kakeibo reflection. This helps you spot patterns, reduce wasteful purchases, and make sure your money choices support your bigger goals.
08:57 PM
I'm really busy and only have 5 minutes today. Can you shorten my activities?
08:57 PM
Absolutely! I'll streamline today's check-in so you can quickly review your top three purchases and answer one reflection question. This way, you’ll still build awareness without taking much time.
08:58 PM
targetYen Mind
6
V

Good evening!

Loading...

list_alt
No activities available for today.
You're on a roll!
6 day streak
Today is June 22
check
check
check
check
check
check
S
M
T
W
T
F
S
infoWhat counts towards your streak?
checkReview a progress update
checkFinish a lesson
checkComplete an activity or session
checkTrack a measurement
Today
Plan
Progress
Coach

Your Plan

calendar_month
No plan data available for this app.
Today
Plan
Progress
Coach

Your Progress

monitoring
No measurements configured for this app yet.
Today
Plan
Progress
Coach

Including everything you need to succeed:

psychology

AI money coach chat for instant, practical advice anytime

keyboard_arrow_down

Ask questions and get direct, actionable guidance rooted in Japanese financial wisdom and experience.

assignment_turned_in

Personalized financial plan based on your habits and goals

keyboard_arrow_down

Get a step-by-step plan tailored to your income, spending, and unique money challenges.

auto_stories

Japanese money rules library with clear explanations and steps

keyboard_arrow_down

Explore proven budgeting, saving, and minimalist strategies from Japanese financial philosophy.

question_answer

Daily kakeibo prompts to reflect before every purchase

keyboard_arrow_down

Answer simple questions to build mindful spending habits and avoid wasteful purchases every day.

insights

Progress tracker to visualize your savings growth over time

keyboard_arrow_down

See your savings improve, track habits, and celebrate milestones as you build financial confidence.

fact_check

Spending diagnosis to spot your financial weak points

keyboard_arrow_down

Get a clear breakdown of where your money goes and what’s holding you back from saving more.

check_circle

Actionable steps for every money rule and lesson

keyboard_arrow_down

Turn insights into action with simple, practical steps you can apply right away to your finances.

calendar_today

Flexible check-ins to fit your schedule and keep you accountable

keyboard_arrow_down

Set reminders for daily, weekly, or monthly reviews—so you stay on track without overwhelm.

emoji_objects

Mindset shifts inspired by Japanese minimalist philosophy

keyboard_arrow_down

Learn to value what you have, reduce waste, and focus on what truly matters with every decision.

Created by kei

"After years of blending Japanese and American money habits, I built the coach I wish I had"

Kei

Kei

Japanese-American personal finance expert helping thousands rethink spending and save more with proven Japanese money principles.

Growing up between Japan and the United States, I saw firsthand how differently people approach money—and how much we can learn from both cultures. In Japan, I learned the value of kakeibo budgeting, the wisdom of mottainai (waste nothing), and the power of minimalist money rules. But when I moved to America, I noticed how easy it was to fall into mindless spending and financial stress, even with a good income.

For years, I struggled to find a system that actually worked for my life. I tried every budgeting app and spreadsheet, but nothing stuck. It wasn’t until I returned to my roots—combining Japanese financial philosophies with practical, everyday tools—that I finally started to see real change. My savings grew, my spending became intentional, and I felt genuinely at peace with my money.

I built this app because I know how overwhelming personal finance can feel, especially when advice is either too strict or too vague. My goal is to give you a direct, practical, and encouraging guide—one that diagnoses your unique money habits and helps you build a plan rooted in time-tested Japanese principles.

Every feature in this app comes from my own journey and the lessons I’ve shared with friends, family, and clients. I believe anyone can transform their relationship with money, no matter where they start. My hope is that this app helps you waste less, save more, and finally feel in control of your financial future.

YouTube video
Yen Mind

Follow Kei's proven process & master Japanese money habits

Apply kakeibo budgeting to track spending
Adopt mottainai to reduce financial waste
Set clear, achievable savings goals
Reflect daily with mindful spending prompts
Diagnose and fix your biggest money leaks
Build minimalist money routines that last
Understand Japanese money rules in plain language
Make confident, values-based purchase decisions
Track your savings progress over time
Develop lifelong habits for financial peace
AI-POWERED COACHING

Every single day in the app is 100% personalized to you.

Built with powerful AI, this app is unlike anything you've ever used before. Your entire experience will be designed just for you.

assignment

Kakeibo Reflection: Mindful Spending Check-In

Personalized Practice • 8 min

Reflect on your recent purchases using classic kakeibo questions. This activity helps you build mindful spending habits by connecting your daily choices to your long-term financial goals, all tailored to your unique situation.

What to do
list
Today's Purchases Review
2 min
chevron_right
question_answer
Kakeibo Reflection Questions
3 min
chevron_right
spa
Mottainai Mindset Exercise
2 min
chevron_right
analytics
Savings Progress Snapshot
1 min
chevron_right
How it works

Transform your finances in 4 simple steps

It only takes a few minutes to get started

Onboarding Quiz

What’s your biggest money goal right now?

Save more each month
Stop impulse spending
Stick to a budget that works
Feel less stressed about money
1

Complete the onboarding quiz

Share your income, spending habits, goals, and money struggles so the app can tailor guidance to your unique situation.

Your Plan

Week 1

Foundations of Japanese Money Habits

Set up kakeibo journal
Track daily spending
Identify wasteful habits
Reflect on needs vs. wants
Week 2Upcoming

Applying Minimalist Money Rules

2

Get your personalized plan

Receive a step-by-step plan rooted in Japanese money principles, designed to address your financial weak spots and goals.

Today, June 22

6
V

Morning Money Mindset

Lesson • 3 min

Expense Reflection

Journal • 4 min

Kakeibo Daily Check-In

Activity • 5 min

Money Rule Library

Browse • 6 min

3

Follow daily tasks to stay on track

Check in daily with kakeibo-style prompts and get practical advice from the AI coach to build mindful money habits.

Your Progress

Monthly Savings Rate

82%

as of Jun 15

MarchJune

Wasteful Spending Reduced

32.7 currency

as of Jun 15

MarchJune
4

Track progress & see real results

Watch your savings grow and spending habits improve with clear progress tracking and ongoing encouragement from the app.

It only takes 2 minutes to get started

starstarstarstarstar

Join over 1,000,000 people achieving their goals on Studio

Whatever your goal, find a life-changing app on Studio

Quote

The app is beyond compare!

The app is beyond compare! Best ever! I mean, this is like a Ferrari engine when I'm used to driving a tractor.
D
starstarstarstarstar
Daphne A.
Verified Studio customer
Quote

It's blown my mind

I love the app - it's blown my mind actually. I don't know how you've managed to make it so personalised but congratulations - it's just superb. I love how simple and uncomplicated it is (and very effective).
M
starstarstarstarstar
Martine L.
Verified Studio customer
Quote

The coaching is phenomenal

I use AI every day in my work and I absolutely love the app. The coaching is phenomenal. I've done multiple programs, but this is by far the best experience.
M
starstarstarstarstar
Monica R.
Verified Studio customer
Quote

I'm blown away by the personalization

As I use this app, I'm blown away by the personalization - it feels like it truly understands what I need. I can't say enough positive things about this app; it's been a game changer.
W
starstarstarstarstar
William T.
Verified Studio customer
Quote

Brilliant app! Five stars are not enough!

Brilliant app! Five stars are not enough! I cannot recommend this app more highly!
J
starstarstarstarstar
Jane M.
Verified Studio customer
Quote

This app is everything that I have been looking for

This app is everything that I have been looking for because it feels so personalized. I'm trying to accomplish extraordinary change in my life and that is exactly what I needed. Nothing but positive feedback from me, thank you again!
A
starstarstarstarstar
Amy C.
Verified Studio customer
Quote

Worth every penny

I have been using the app for over a month and it is proving to be worth every penny by providing personalized support, strategies and education in a structured environment that has really helped me to stay focused. It's a phenomenal tool!
T
starstarstarstarstar
Tim P.
Verified Studio customer
Quote

It's making a huge difference for me

I want to sincerely thank you for creating this product. I have not been a huge fan of AI in general, but this use case is exceptional. It's making a huge difference for me.
A
starstarstarstarstar
Alana G.
Verified Studio customer
Quote

Thank you for creating this app!

I'm only on day 4, but I already feel like the weight of the world has been lifted off my shoulders. Thank you for creating this app! It's already making such a difference <3
A
starstarstarstarstar
A. U.
Verified Studio customer
Quote

I am blown away

I went in with no expectations really. I've been in online coaching for 15 years professionally, and I know how hard it is to deliver something that is accessible and progressive. I am blown away.
B
starstarstarstarstar
Brahim
Verified Studio customer
Quote

One of the best discoveries ever

Studio has been one of the best discoveries ever. This app is amazing; fun, enjoyable, and so incredibly useful. I've never been one to use apps like these too much, but yours just blew my mind.
M
starstarstarstarstar
Maria
Verified Studio customer
Quote

I accomplished more in 4 weeks than 10 years

I feel like I accomplished more in the past 4 weeks than I did the past 10 years. I'm amazed by what you were able to pull off with Studio and I hope more people benefit from it.
M
starstarstarstarstar
Marty
Verified Studio customer
Forbes logoABC logoWall Street Journal logoVariety logoTechCrunch logo
FAQ

Your questions, answered

Who is this app for?
expand_more
What will I learn in this app?
expand_more
How much time do I need to dedicate to this app?
expand_more
Is this app suitable for beginners?
expand_more
How personalized is the experience?
expand_more
What kind of support is available?
expand_more
Today's the day

Start transforming your finances with Japanese money wisdom

You’re only minutes away from getting your personalized money coaching plan. Start achieving your financial goals today alongside Kei.