Vocabulary What does 5月 (ごがつ, gogatsu) mean? 5月 (ごがつ, gogatsu) means May. Quick factsReadingごがつRomajigogatsuPart of speechnoun 5月ごがつgogatsuMay1noun May2noun fifth month of the lunar calendarAlso written: 五月Kanji in this word月month; moon