Tools
Calculators and planning tools. Everything runs in your browser — tools, not advice.
Money Plan
Answer a few ranges and get a private 1/5/10-year roadmap with cash-flow, emergency-fund, allocation, and projection.
Open →Compound Interest Lab
See how contributions, time, fees, and inflation shape a hypothetical portfolio — with the lessons behind the curve.
Open →NISA Starter Planner
Check whether you are ready, see multi-horizon projections, and get the documents and questions to bring to a brokerage.
Open →Japan Budget Planner
Build a Japan-specific monthly budget, see essential vs discretionary, your savings rate, and an emergency-fund target.
Open →Emergency fund calculator
Target¥1,500,000
Gap¥1,000,000
Funded33%
A guide, not advice. Most households target 3–6 months of expenses.
Researched & in progress
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