If the following grounds are found with respect to an arbitrator, the parties may challenge the arbitrator:
当事者は、仲裁人に次に掲げる事由があるときは、当該仲裁人を忌避することができる。
the arbitrator fails to satisfy the requirements provided by the agreement of the parties; or
当事者の合意により定められた仲裁人の要件を具備しないとき。
there are reasonable grounds to doubt the impartiality or independence of the arbitrator.
仲裁人の公正性又は独立性を疑うに足りる相当な理由があるとき。
A party that has appointed an arbitrator or that has made a recommendation for appointment or otherwise similarly participated in the appointment of the arbitrator may challenge that arbitrator only if they do so on grounds that they become aware of after the appointment.
仲裁人を選任し、又は当該仲裁人の選任について推薦その他これに類する関与をした当事者は、当該選任後に知った事由を忌避の原因とする場合に限り、当該仲裁人を忌避することができる。
A person who has been requested to assume the post of an arbitrator and intends to accept the negotiation must disclose to the person that made the request all facts that would be likely to give rise to doubts as to their impartiality or independence.
仲裁人への就任の依頼を受けてその交渉に応じようとする者は、当該依頼をした者に対し、自己の公正性又は独立性に疑いを生じさせるおそれのある事実の全部を開示しなければならない。
An arbitrator must disclose all the facts that would be likely to give rise to doubts as to their impartiality or independence (excluding those which have already been disclosed) to the parties without delay during the course of the arbitration procedure.
仲裁人は、仲裁手続の進行中、当事者に対し、自己の公正性又は独立性に疑いを生じさせるおそれのある事実（既に開示したものを除く。）の全部を遅滞なく開示しなければならない。