Observed arrival · 2026-10-15
Mendou Lab’s toolbox for everyday calculations
A Japanese collection of free web tools for practical calculations, creative tasks, and small everyday decisions.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Japanese users handling everyday calculations and small tasks
- Worth noticing
- The page says inputs stay in the browser, with no account or installation, and labels the site a prototype.
Field notes
Several tools combine inputs into bundled results: a birth date is described as yielding age, Japanese-era year, zodiac, school year, and unlucky-year information, while a moving estimate uses household size, room type, and belongings. The homepage also describes a customizable QR-code maker and a password generator with a strength check. These are presented as browser-processed tools, though the page identifies itself as a prototype.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
◎NicheUnusually specific use
One card from the complete issue