Japan has had no government autumn forecast since 2008, and it only ever covered Kanto. Every date you read comes from a private company. What the state still measures, and why its definition is not the one you want.
The 2026 floor-maple opening runs 17 October to 30 November, at 800 yen in October and 1,200 in November. JNTO puts the temple in the wrong prefecture and the temple English page gets the illumination an hour wrong.
Arashiyama, Nikko and Yabakei share a title nobody officially awarded. In 2026 they peak three and a half weeks apart — and one of them has no bus at the weekend.
Tsuki-no-Ishi Momiji Park in Nagatoro and Torii Kannon in Hanno have no English guide page. The illumination hours, the two fees, the weekend-only statue and the train that strands you — checked against the operators.
The 2026 festival runs 7-29 November with the illumination ending at 21:00, half an hour earlier than last year, and the town car park charged for the first time. Neither change exists in English.
Two of Kyushu late-autumn best sites have almost nothing written about them in English, and what exists is out of date. Prices, illumination dates, the weekday bus problem, and three corrections to the official English record.
Four brick tunnels on Japan's original 1900 Chuo Line, abandoned in 1966 and locked ever since, open for nine days from 28 November 2026. Dates, fares, the 33-minute run from Nagoya, and why the maples may or may not cooperate.
All 12 months on one scale - JMA temperatures, real crowd drivers, costs and what you will actually see - plus the honest first-trip pick and the 2027 dates that move prices.
Kusamomiji turns Ozegahara gold from mid-September, weeks before maple season. What it is, the 2026 Hatomachi Pass access, and day trip vs hut night.
September autumn colour is real in Japan - Daisetsuzan from late August, the Alps and Oze from mid-month. Where it is, week by week, with 2026 access rules.
Field notes, weekly
One email a week. The Japan worth planning around.
Nearly every image on Hidden Japan Gems was photographed by me on a Sony α7 across five years of walking Japan; a few licensed photos fill the gaps. Please don't re-use my photos without permission — reach out if you'd like to.
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