^oh wait, some text on that site about the buttons is helpful:
■ : フォロー投稿画面表示 ★ : 投稿者検索表示 ◆ : スレッド表示
Google translate:
■: Follow post screen display ★: Poster search display ◆: Thread display
The URLs of that site are still weird.
>>405
*this website to me