A Father of Two's FIRE Journey
Balancing parenting, side projects, and investing for financial independence
Latest Posts
《November 2025》Monthly Report: Side Income & Investment Results【App Development × Asset Management】
2025-11-30 · 3 min read
Monthly report summarizing November 2025 side income (app development) and investment performance (Rakuten Securities & Defined Contribution Pension). Sharing revenue highlights, investment results, total assets, reflections, and future plans.
App Monetization Strategy: Real-World Lessons & How I 2.5x Subscription Revenue
2025-11-28 · 10 min read
An indie developer with 30-40K MAU shares lessons learned from failures, how they improved subscription revenue by 2.5x, and practical RevenueCat implementation guide.
![5 Time Management Strategies for Side Business Success [A Father's Real Experience]](/images/blog/time-management-for-side-business/hero.png)
5 Time Management Strategies for Side Business Success [A Father's Real Experience]
2025-11-26 · 6 min read
Starting a side business makes time management challenging. Learn 5 sustainable strategies I discovered after failing by working until midnight and affecting my main job.
My First Tax Return with ¥650K Side Income | Why I Chose Blue-Form Filing and the Address Privacy Issue
2025-11-24 · 11 min read
In 2021, my app revenue reached approximately ¥650,000, requiring my first tax return filing. Choosing blue-form filing, using Money Forward for business registration, and dealing with Google's address disclosure requirement by getting a virtual office. Essential tax and expense management knowledge for indie developers.
Tena / Father in his 30s
A father of two on the journey to Financial Independence through side businesses and investing.
Established side income through app development, achieving ¥23 million in assets in 7 years.
Sharing practical experiences and real insights.