Import diff from https://github.com/sisimai/p5-Sisimai/pull/229/files#diff-d758468cbd29e31ca815a34537ea90af #78
Import diff from https://github.com/sisimai/p5-Sisimai/pull/229/files#diff-d758468cbd29e31ca815a34537ea90af #78

azumakuniyuki/rb-Sisimai,azumakuniyuki/rb-Sisimai