Complex sentence: During his days in Sakaide Elementary and Lower Secondary School Attached to the Faculty of Education, Kagawa University, Yoshikawa became fascinated by tape recorders for piano lesson, and it became a hobby to play piano or guitar and record it.
Split into simpler sentences: During his days in Sakaide Elementary and Lower Secondary School (attached to the Faculty of Education, Kagawa University), Yoshikawa became fascinated by the tape recorders that they used during piano lessons. It soon became his hobby to play piano or guitar and record it.