No, underglow lighting is prohibited under Japan’s Road Traffic Act and related regulations, as it is classified as unauthorized vehicle modification that impairs visibility or distracts other drivers. The National Police Agency enforces these rules, and violations may result in fines or vehicle inspection failures. Recent 2026 amendments to the Act aim to tighten enforcement against non-compliant modifications, including decorative lighting.
Key Regulations for Underglow Lighting in Japan
- Road Traffic Act (Article 41): Prohibits modifications that alter a vehicle’s original lighting system or emit light in a manner that could mislead other road users. Underglow lighting falls under this restriction due to its potential to distract or obscure signals.
- Ministry of Land, Infrastructure, Transport and Tourism (MLIT) Guidelines: Clarify that any lighting installed below the vehicle’s body or directed outward violates safety standards. Compliance requires certification from authorized inspection bodies, which underglow kits typically fail to meet.
- Local Ordinances: Prefectural police departments, such as those in Tokyo and Osaka, actively conduct roadside checks for non-compliant modifications. Vehicles with underglow lighting may be subject to immediate removal or fines up to ¥500,000 under the Act’s penal provisions.
Enforcement prioritizes public safety over aesthetic modifications, with no exemptions for recreational or aftermarket lighting. Importing underglow kits also risks confiscation under customs regulations enforced by the Japan Customs.