In 2026, the primary low season in Japan occurs during the winter months of January and February (excluding the New Year holidays) and again in the early summer rainy season (June). During January and February, temperatures are cold, which deters many tourists, leading to accommodation savings of 30% to 50% compared to the peak spring cherry blossom season. The second "shoulder-low" period is June, known as tsuyu (the plum rain season); while the humidity is high and rainfall is frequent, it is an excellent time for budget travelers to find deals and enjoy lush, green landscapes without the massive crowds of April or November. Conversely, you must avoid "Golden Week" (late April to early May) and "Obon" (mid-August), as these are peak domestic travel periods in 2026 when prices triple and transportation is fully booked. For the best balance of low prices and manageable weather, the first two weeks of December are also considered a savvy 2026 choice.