About Japan Trip Math & our sources
Japan Trip Math is a small set of free calculators for people traveling to Japan, run by panda studio. We are not affiliated with Japan Railways, the National Tax Agency, the Japan Tourism Agency or any airline.
How we work
- We take prices and rules from official pages and show the date we checked them (September 25, 2026).
- When a number is our own estimate, the page says so.
- We re-check JR prices and the tax rules regularly and after announced changes. If an official page and this site disagree, the official page is right.
All sources
- JAPAN RAIL PASS official site — prices: https://japanrailpass.net/en/purchase/price/
- JR West press release (JR Group), Apr 9, 2026 — price revision: https://www.westjr.co.jp/press/article/2026/04/09/page_30553.html
- Impress Watch, Apr 9, 2026 — official online site keeps the old price for a limited period: https://www.watch.impress.co.jp/docs/news/2100482.html
- Smart EX official — service and prices (JR Central / JR West / JR Kyushu): https://smart-ex.jp/en/product/plan/service/
- Smart EX price table, ordinary car reserved seat (PDF): https://smart-ex.jp/product/plan/service/pdf/service_fares_reserved.pdf
- JR Central — Special ticket for NOZOMI with JAPAN RAIL PASS: https://global.jr-central.co.jp/en/onlinebooking/contents/jrp_nozomi/
- JR East — fare search (for routes not listed): https://www.jreast.co.jp/en/2026unchin-kaitei/
- National Tax Agency — Overview of the Refund Method (English): https://www.nta.go.jp/publication/pamph/shohi/menzei/202506/pdf/0025006-106.pdf
- National Tax Agency / Japan Customs — Notice to foreign travelers (from November 2026): https://www.nta.go.jp/publication/pamph/shohi/menzei/201805/pdf/caution_en.pdf
- National Tax Agency — Refund method pamphlet for shops (Dec 2025, Japanese): https://www.nta.go.jp/publication/pamph/shohi/menzei/201805/pdf/0025012-025_01.pdf
- National Tax Agency — Refund method Q&A (July 2026, Japanese): https://www.nta.go.jp/publication/pamph/shohi/menzei/201805/pdf/0026006-152_01.pdf
- JNTO Travel Japan — Japan's new tax-free shopping system: https://www.japan.travel/en/us/blog/everything-you-need-to-know-japans-new-tax-free-shopping-system/
- National Tax Agency — Tax Answer No.7195, International Tourist Tax (Japanese): https://www.nta.go.jp/taxes/shiraberu/taxanswer/inshi/7195.htm
- Japan Tourism Agency — Inbound Consumption Trend Survey, 2025 (final), Mar 31, 2026 (Japanese): https://www.mlit.go.jp/kankocho/content/001992584.pdf
- Netflix Help — How to control how much data Netflix uses: https://help.netflix.com/en/node/87
- Spotify Support — Audio quality: https://support.spotify.com/us/article/audio-quality/
- Zoom Support — Bandwidth requirements: https://support.zoom.com/hc/en/article?id=zm_kb&sysparm_article=KB0060748