Yasu-Hiko Tohsaku

Yookoso! An Invitation to Contemporary Japanese

Yasu-Hiko Tohsaku, Yasuhiko Tohsaku, 1999 .

The Relation between Grammar Instruction and the Development of Communicative Abilities--Some Observations Based on an Experiment in Japanese Classrooms

Yasu-Hiko Tohsaku, 1991 .