How big is your dog? If it is not a trained Service Dog eligible for the same title in Japan [you can easily get this document if it is], it will very, very likely require crating in a stroller or hand luggage.

Josh, I am sorry but I do not know. Check their website, I am sure you can email them. Good luck.

Try Goal International Co., Ltd. I believe the website is http://www.pickupairport.online, if thats not right, Google it. I will be using them when I travel with my service dog. They are very accommodating.

Thank you, much appreciated. I will give them a few days.

Have you looked at the Citadines in Shinjuku, they have 2 properties that state that they are wheelchair accessible and include a launderette, microwave, refrigerator.