Tatsuaki m JapaneseFrom 達
(tatsu) meaning "reach, arrive, attain," 辰/龍/竜
(tatsu) meaning "dragon" (辰 referring to the fifth sign of the Chinese zodiac), 立
(tatsu) meaning "to stand, rise," cognate to 建
(tatsu) meaning "to build, erect," or 樹
(tatsu) meaning "tree" (in this case, related to 立 and 建), combined with あき
(aki), related to brightness or opening with kanji including 明, 昭, 章, 朗 or 昌, or 秋
(aki) meaning "autumn."