Only the current version so far — new entries appear as the app ships updates.
スタッフサービス ぽけっと is an education app by STAFF SERVICE CO., LTD. with 50,000+ downloads (about 91K estimated). +419 installs in the last 7 days. Install growth, rank history, SDKs and ad networks.
From the store listing: “[Staff Service Official Staff Service Pocket] This is a smartphone education app provided by Staff Service Co., Ltd.”