Japanese Summer in Japan.

Late May and September–October are the sweet spot — the heat is manageable, the rainy season (early June to mid-July on Honshu) is over, and most eco-hotels offer their lowest rates. July and August are humid in the south and crowded everywhere; Hokkaido is the smart pick if you must travel mid-summer, with average highs in the low 20s C.

The Japan Rail Pass gives 7, 14 or 21 consecutive days of unlimited travel on JR trains nationwide — including all Shinkansen except the Nozomi and Mizuho fastest services, JR commuter lines in Tokyo and Osaka, and the JR ferry to Miyajima. Per passenger, a Tokyo–Kyoto Shinkansen leg emits roughly 90% less CO₂ than the equivalent ANA or JAL flight, and the JR Pass usually pays for itself after a single Tokyo–Osaka round-trip.

The Hokkaido Shinkansen runs from Tokyo to Shin-Hakodate-Hokuto in roughly 4 hours, with the famous 53-km Seikan Tunnel between Honshu and Hokkaido — the longest undersea rail tunnel in the world. From Shin-Hakodate it is a limited-express train to Sapporo (the full Shinkansen extension to Sapporo is in progress for late 2030). Per passenger, the Hokkaido Shinkansen emits roughly 90% less CO₂ than the equivalent flight.

No — booking through IMPT costs the same as booking direct, with the carbon removal paid from our commission. Japanese hotel rates spike around Golden Week (late April to early May), Obon (mid-August) and the New Year holiday — that's pure supply-and-demand, not an eco-premium. Ryokan inns are generally more expensive than business hotels because they include kaiseki dinner and breakfast, not because of certification.

Tokyo plus Kyoto is the classic Golden Route pairing — five nights in the modern capital, then a Shinkansen down to the old capital for three or four nights, with day-trips to Nara, Osaka and Hiroshima from a Kyoto base. Add Hokkaido as a fourth leg if you are travelling in July or August and want to escape the southern humidity.

Every reservation triggers a verified one-tonne CO₂ removal — UN-certified, paid from our commission. The offset comes from a portfolio of reforestation and renewable-energy projects, and is enough to fully balance a typical long-haul flight from Europe to Tokyo plus a 7-night stay. See how we carbon-balance every stay.