Japanese capital vs Yedo

Japanese capital and Yedo both are nouns.

Word	Noun	Adjective	Verb	Adverb
Japanese capital	Yes	No	No	No
Yedo	Yes	No	No	No

As nouns, Japanese capital and Yedo are synonyms defined as:

Japanese capital and Yedo: the capital and largest city of Japan; the economic and cultural center of Japan

Other synonyms of Japanese capital include capital of Japan, Edo, Tokio, Tokyo, Yeddo.

Japanese capital (noun)	Yedo (noun)
the capital and largest city of Japan; the economic and cultural center of Japan	the capital and largest city of Japan; the economic and cultural center of Japan