In 2026, 40,000 yen is generally not enough to cover a full week in Japan for the average international traveler. Following the massive price hike of the Japan Rail (JR) Pass in late 2023 and the introduction of various tourist taxes, a "budget" traveler now typically needs at least ¥12,000 to ¥18,000 per day (totaling roughly ¥84,000 to ¥126,000 for a week). This covers basic accommodation in a hostel or capsule hotel, casual meals at convenience stores or ramen shops, and local transportation. If you have already pre-paid for your hotel and just need 40,000 yen for "spending money" (food and local trains), it is possible but extremely tight—allowing only about ¥5,700 per day, which leaves little room for entrance fees to major temples, Shinkansen trips, or shopping. For a comfortable mid-range experience including a few nice dinners and regional travel, a budget of closer to ¥150,000 to ¥200,000 for the week is a much more realistic recommendation for 2026.