When boarding the Shinkansen, the following regulations apply: You may bring up to two pieces of baggage on board free of charge. For each bag the total of the length, width and height must not exceed 250 centimetres, the length must not exceed two meters and the weight must be no more than 30 kilograms.

Yes, you can bring luggage on the Shinkansen (Japanese bullet train), but in 2026, there are specific "Oversized Baggage" rules you must follow to avoid a 1,000-yen penalty. If your bag's total dimensions (Length + Width + Height) are between 160 cm and 250 cm, you must book a "Seat with Oversized Baggage Area" in advance. These seats are located at the back of the car, and the reservation is free if made at the time of ticket purchase. If your bag is smaller than 160 cm, you can store it in the overhead racks or at your feet without a reservation. Bags exceeding 250 cm are strictly prohibited and must be sent via a luggage delivery service like Takkyubin (which is highly recommended in 2026 for a "hands-free" travel experience). Each passenger is limited to two large pieces of luggage (30 kg each). These rules apply specifically to the Tokaido, Sanyo, and Kyushu Shinkansen lines. By following these guidelines, you ensure a smooth boarding process and avoid blocking the aisles, which is a major point of etiquette in Japan's highly disciplined and efficient public transportation culture.