english

The Chain of Fixed Costs | Money Premise

A simple guide for teenagers about fixed costs, emergency funds, and why weekly payments can become financial chains. Learn how to protect your future freedom by understanding money in the right order.

2026.02.22

③ お金の前提　Money Assumptions

Future of Work | Special Edition

A letter to my 15-year-old about the future of work. Employment or independence is not the real question. The real power lies in designing your career using education, skills, and visibility.

2026.02.21

② 人生設計の前提　Life Design Assumptions

Investing for the Next Generation｜Episode 16

Investing isn’t about chasing quick returns. It’s about building a structure that doesn’t break. A clear and simple guide for 15-year-olds on money, emergency funds, trust, and long-term thinking.

2026.02.21

③ お金の前提　Money Assumptions

To My 15-Year-Old

Listen carefully.Society isn’t kind.But it isn’t cruel either.It simply runs on structure.And most young people are thro...

2026.02.19

③ お金の前提　Money Assumptions

To My 15-Year-Old Son

Success Is Not an AddressBy the time you read this,our life may look different.Maybe we won’t be on the boat.Maybe our w...

2026.02.17

① 思考の前提　Assumptions of Thinking

After 50 Is Not Old Age — It’s Chapter Two

A mother’s 2026 reflection on life after 50. Not expansion, but optimization. Not dependence, but resilience. A structural approach to lowering ruin probability for the future.

2026.02.16

② 人生設計の前提　Life Design Assumptions

To My 15-Year-Old

A letter to a 15-year-old about politics, money, and religion. These topics aren’t dangerous — they simply require the right handling skills. A calm guide to understanding structure without conflict.

2026.02.16

② 人生設計の前提　Life Design Assumptions

Final Chapter To You, at　１５

Two years after a brain hemorrhage, and after inheriting my father-in-law’s Nissan X-Trail, I learned this: breaking is not the end. A letter to my 15-year-old about resilience, repair, and how to keep moving.

2026.02.16

aya story

Episode 1｜Investing Is Not About Growth. It’s About a Design That Doesn’t Break.

Before talking about stocks or ETFs, understand this: investing is not about chasing returns. It’s about building a life structure that can withstand pressure. A foundational guide for teenagers and beginners.

2026.02.15

③ お金の前提　Money Assumptions

To You at 15

You’re not buying a house anytime soon.But one day, you’ll hear the words:“Home loan.”“Mortgage.”“Borrowing power.”When ...

2026.02.14

③ お金の前提　Money Assumptions

english

The Chain of Fixed Costs | Money Premise

Future of Work | Special Edition

Investing for the Next Generation｜Episode 16

To My 15-Year-Old

To My 15-Year-Old Son

After 50 Is Not Old Age — It’s Chapter Two

To My 15-Year-Old

Final Chapter To You, at １５

Episode 1｜Investing Is Not About Growth. It’s About a Design That Doesn’t Break.

To You at 15

Final Chapter To You, at　１５