Observed arrival · 2026-10-18
kozu labs: fan-event and bookkeeping calculators
A free Japanese-language collection of calculators and practice tools for live-event spending, ticket lotteries, and Bookkeeping Level 3.
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$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Japanese live-event fans and Bookkeeping Level 3 learners
- Worth noticing
- The site says inputs stay in the browser; ticket tracking includes payment-deadline alerts and CSV export.
Field notes
Travel costs can be split across people after comparing Shinkansen, overnight bus, and air fares; the ticket tracker combines application status, payment deadlines, win-rate totals, and CSV export. The bookkeeping section includes depreciation schedules, an eight-column worksheet with balancing checks, and account lookup by kana; the site describes these as study aids and tells users to follow the question or official materials in exams and practice.
Observed signals
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Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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