Import diff from https://github.com/sisimai/p5-Sisimai/pull/229/files#diff-3b581f134eab588ebf5c794e364e673f #78
Import diff from https://github.com/sisimai/p5-Sisimai/pull/229/files#diff-3b581f134eab588ebf5c794e364e673f #78

azumakuniyuki/rb-Sisimai,azumakuniyuki/rb-Sisimai