October sits in a sweet spot that many experienced Japan travelers consider the single best month to visit. Summer heat is gone, the infamous humidity drops, and early autumn colors appear in the mountains while city crowds remain manageable compared to peak November.
October Weather
Tokyo: Highs 20–25°C, lows 13–18°C. Light jacket in the evenings. Rarely rains. Kyoto: Similar — slightly warmer in early October. Some of the best walking weather of the year. Hokkaido: Peak autumn foliage in Daisetsuzan. Highs 10–15°C — bring a warm layer. Okinawa: Still 28°C, typhoon risk decreasing but possible through mid-October.
Autumn Foliage (Koyo) Starts
October marks the beginning of the annual foliage wave: Hokkaido: Peak mid-October — mountains turn deep red and gold. Tohoku (Nikko, Towada): Late October. Nikko's mountain areas hit peak around October 20–30. Tokyo, Kyoto, Osaka: Early November — October is still green in cities but the air changes. For the earliest accessible foliage from Tokyo: Nikko (Oct 20–Nov 5) is the prime option.
October Events
Jidai Matsuri (Kyoto, October 22): "Festival of the Ages" — a 2 km procession of 2,000 people in historically accurate costumes representing every era of Japanese history. Free to watch along the route. One of Kyoto's three main festivals. Kurama Fire Festival (Kyoto, October 22): Torchlit procession on the same night as Jidai Matsuri — atmospheric mountain village ceremony north of Kyoto. Japan Cup Horse Race (Tokyo, late October): Major international horse racing at Tokyo Racecourse. Halloween in Shibuya: Tokyo's Halloween culture peaks October 31 — Shibuya Crossing fills with elaborate costumes (and crowds of several hundred thousand). Deliberately participatory or deliberately avoidable depending on preference.
Why October Beats November for Some Travelers
November foliage is spectacular but produces Kyoto's most crowded and expensive accommodation period. October offers: 20–40% lower hotel rates than November peak · Comparable walking weather · Mountain foliage accessible via day trips (Nikko, Hakone) · Room to actually move through temples without fighting crowds. The trade-off: city trees are still green — the full Kyoto transformation comes in November.
October Food
October starts: matsutake mushroom season (the most expensive and aromatic mushroom in Japan — ¥30,000–¥100,000/kg) · New harvest rice (shinmai) — noticeably sweeter than stored rice · Sanma (Pacific saury) — the October fish, grilled whole with grated daikon · Autumn nabe (hot pot) season begins