National Route 204 is a national highway of

Japan Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...

connecting

Karatsu, Saga is a city located in Saga Prefecture on the island of Kyushu, Japan. Its name, formed from the Japanese word roots 唐 ''kara'' (China, or continental East Asia in general), and 津 ''tsu'' (port), signifies its historical importance as a ...

and

Sasebo, Nagasaki is a Core cities of Japan, core city located in Nagasaki Prefecture, Japan. It is also the second largest city in Nagasaki Prefecture, after its capital, Nagasaki. On 1 June 2019, the city had an estimated population of 247,739 and a population de ...

in Japan, with a total length of 157 km (97.56 mi).

References

National highways in Japan Roads in Nagasaki Prefecture Roads in Saga Prefecture {{Japan-road-stub