Japan Trip Tools is an independent, ad-free set of small planning tools for travelers visiting Japan. It's a solo project, run and maintained by an individual operator based in Tokyo, Japan — not affiliated with the Japan Meteorological Agency, JNTO, or any tour operator.
Site: triptoolsjapan.com
Operator: Japan Trip Tools (individual operator, Tokyo, Japan)
Contact: hello@triptoolsjapan.com — questions, corrections, and partnership enquiries welcome. We aim to reply within a few days.
Found a number that looks wrong for a city you know well? Please tell us — accuracy is the whole point of this tool.
Bloom/foliage timing (first bloom, full bloom or peak color, and end of the viewing window) and year-to-year variability are derived from Japan Meteorological Agency historical observation data for each city. Your trip's overlap probability is computed from that history using a normal-distribution model — it is a statistical estimate based on the past, not a live weather forecast for this year. See each result card's "updated" note for whether an in-season adjustment has been applied.
Some result cards include links to hotel and tour booking partners (for example Agoda, Booking.com, Klook, or KKday). If you book through one of these links, Japan Trip Tools may earn a small commission at no extra cost to you. Affiliate placement never influences the probability numbers shown — those come only from the historical data model above.