Brief: Riken Corundum says change of president
Dec 20 (Reuters) - Riken Corundum Co Ltd 5395.T :
* Says it appoints Tomio Masuda as new president to succeed
Hiroyoshi Shimomura, effective on Jan. 1, 2018
Source text in Japanese: https://goo.gl/M4MRAk
Further company coverage: 5395.T
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