Article 71-4Rules to Be Observed by Riders of Large Two-Wheeled Vehicles and Other Vehicles
第七十一条の四（大型自動二輪車等の運転者の遵守事項）
A person riding a standard or large motorcycle must not ride that vehicle without wearing a motorcycle helmet, and must not carry a passenger who is not wearing a motorcycle helmet.
A person riding a general motorized bicycle must not ride that vehicle without wearing a motorcycle helmet.
The driver of a specified small motorized bicycle must endeavor to wear a motorcycle helmet.
特定小型原動機付自転車の運転者は、乗車用ヘルメットをかぶるよう努めなければならない。
A person holding a large motorcycle license as referred to in Article 84, paragraph (3) who is under 20 years of age or who has not held that license for at least three years in total (not counting any period during which it was suspended) (other than a person currently holding a standard motorcycle license as referred to in that paragraph who has held that license for at least three years in total (not counting any period during which the person's license was suspended) and other persons that Cabinet Order prescribes) must not carry a passenger while driving a standard or large motorcycle (other than one with a sidecar; the same applies hereinafter in this Article) on a national expressway or limited highway.
第八十四条第三項の大型自動二輪車免許を受けた者で、二十歳に満たないもの又は当該大型自動二輪車免許を受けていた期間（当該免許の効力が停止されていた期間を除く。）が通算して三年に達しないもの（同項の普通自動二輪車免許を現に受けており、かつ、当該普通自動二輪車免許を受けていた期間（当該免許の効力が停止されていた期間を除く。）が通算して三年以上である者その他の者で政令で定めるものを除く。）は、高速自動車国道及び自動車専用道路においては、運転者以外の者を乗車させて大型自動二輪車（側車付きのものを除く。以下この条において同じ。）又は普通自動二輪車（側車付きのものを除く。以下この条において同じ。）を運転してはならない。
A person holding a standard motorcycle license as referred to in Article 84, paragraph (3) (other than a person also holding a large motorcycle license as referred to in that paragraph) who is under 20 years of age or who has not held that license for at least three years in total (not counting any period during which the person's license was suspended) (other than a person who has held a standard motorcycle license at some point within the six months before the day on which the person came to hold the current license and other persons that Cabinet Order prescribes) must not carry a passenger while driving a standard motorcycle on a national expressway or limited highway.
A person holding a large motorcycle license as referred to in Article 84, paragraph (3) who has not held that license for at least one year in total (not counting any period during which the person's license was suspended) (other than a person currently holding a standard motorcycle license as referred to in that paragraph who has held that license for at least one year in total (not counting any period during which the person's license was suspended) and other persons that Cabinet Order prescribes) must not carry a passenger while driving a standard or large motorcycle.
A person holding a standard motorcycle license as referred to in Article 84, paragraph (3) (other than a person also holding a large motorcycle license as referred to in that paragraph) who has not held that license for at least one year in total (not counting any period during which the person's license was suspended) (other than a person who has held a standard motorcycle license at some point within the six months before the day on which the person came to hold the current license and other persons that Cabinet Order prescribes) must not carry a passenger while driving a standard motorcycle.
Cabinet Office Order provides for the standards for motorcycle helmets as referred to in paragraphs (1) and (2).