How many letters does the top answer for “home of ntt docomo yoyogi building” have?

The most common answer is sendagaya (9 letters).

Crossword clue: home of ntt docomo yoyogi building

3 answers found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

sendagaya 9 letters wd-fact-v3

shibuya 7 letters wd-fact-v3

tokyo 5 letters wd-fact-v3

the capital and largest city of Japan; the economic and cultural center of Japan