Not long after graduation, Hsiao ventured off to Japan for further study at Musashino Academia Musicae. While in Japan, in addition to studying under famous composer Hideo Fujimoto, he also continued to major in piano.
師大畢業不久，蕭泰然又遠赴日本武藏野音樂大學深造，一方面追隨名作曲家藤本秀夫學作曲，一方面繼續主修鋼琴。