Yamada Nobuyuki
Yamagami Yoshiyuki
Yamaguchi Masayasu
Yamaguchi Toyohide
Yamai Iwao
Yamakawa Akira
Yamakawa Sangyo Co., Ltd.
Yamamoto Kosei
Yamamoto Sentaro
Yamamoto Takehisa
Yamaoka Hiroyuki
Yamashita Tomohisa
Yamato Refractives & Co.
Yamazaki Keiichi
Yang Yaping
Yano Junya
Yasaka Tetuya
Yasufuku Ceramics Co., Ltd.
Yasui Nobuo
Yasunaga Hiroaki