National Route 387 is a national highway of Japan connecting

Usa, Ōita is a city located in Ōita Prefecture, Japan at the tip of Kunisaki Peninsula in northern Kyushu. Notable for the Usa Jingū, the head shrine of all 40,000 Hachiman shrines across Japan, the city annually attracts as many as 1.8 million wors ...

and

Kita-ku, Kumamoto is one of the five wards of Kumamoto City, Japan. Meaning literally "north ward," it is bordered by the Nishi-ku, Chūō-ku, Higashi-ku and also by the cities of Yamaga, Kikuchi, Kōshi and the towns of Gyokutō and Kikuyō. As of 2012, ...

in Japan, with a total length of 132.6 km (82.39 mi).

References

National highways in Japan Roads in Kumamoto Prefecture Roads in Ōita Prefecture {{Japan-road-stub