President
YUEI CO., LTD.
President and CEO
MMC RYOTEC Corporation
CEO
Taiyo Chemicals Company Limited
Mabuchi Co.,ltd.
ASAHI TEKKO CO.,LTD
SHOEI KOGYO CO., LTD
Takahashi Metal Co., Ltd.
Takenaka Seisakusho Co., Ltd.
KAWASAKI KIKO CO., LTD.
Kawasaki Geological Engineering Co., Ltd.