Tokyo Metropolitan Police Department kendo refereeing rules (established in 1933, and revised in 1934): Article 8. Fencers shall not do things listed in the following sections;
警視廰劍道審判規定（昭和8年（1933年）、昭和9年（1934年）改定）第8條　試合中左ノ事項ヲ禁止ス。