This one isn't super important so wont add it on the OP.
When you're using your mobile device to view this site the mobile view isn't really friendly so what lots of people do, including me is that we check it on Full Site mode but the problem is once you get into full site mode unless you log out of delete your cookie it will never go back to the mobile view. Most of the time it doesn't really matter since full is still much better imo but some want to go back to mobile view without logging out of deleting cookies so Triairy responded with the following.

Quote Originally Posted by Triairy View Post
こんばんは。

スマートフォンにおいて、Full Siteからスマートフォン版に戻るリンクがないことについては認識しています。
こちらは現在ボタンを追加する方向で調整を進めておりますので、対応まで今しばらくお待ちいただければと思います。

フィードバックありがとうございました。

Good evening,
For smart phones we also noticed there is no link back to mobile view once in full site mode for this one we are looking to add a button to go back, please wait till we address this issue.
Thanks for the feedback.