Pocketbook Appendix

Pocketbook Appendix is a versatile Chrome extension inspired by the Japanese Techo-no-furoku, offering an extensive collection of trivia and common knowledge. This English version provides users with useful information on Japan and beyond, including age tables, conversion charts, emergency numbers, Japanese holidays, time zones, zodiac signs, and much more.

Additional premium features in the Pocketbook Appendix+ paid version include element symbols, size tables, color codes, Yakudoshi, and other cultural references—available ad-free. Perfect for learners, travelers, and trivia enthusiasts, this extension is your pocket companion for quick and reliable information.