To Buy Back Up To 170,000 Shares
May 15 (Reuters) - Yamagata Bank Ltd 8344.T: YAMAGATA BANK LTD - TO BUY BACK UP TO 170,000 SHARES YAMAGATA BANK LTD - TO BUY BACK UP TO 0.55% OF OWN SHARES WORTH 500 MILLION YEN Source text: ID:nTSqo7f9d7 Further company coverage: 8344.T (Reporting by Kiyoshi Takenaka) ((kiyoshi.takenaka@thomsonreuters.com;))