The Japan Patent Office (JPO) provides professional English translations of trial/appeal decisions and decisions on oppositions. You may click the below link to obtain English translations and necessary information. https://www.jpo.go.jp/e/system/trial_appeal/info-general-shinketsu-eiyaku.html  

In Japan, a divisional application can be filed at any time before receiving a first Office Action. After the issuance of a first Office Action, you can file a divisional application before the expiration of a due date for filing a response to the outstanding Office Action. Because you can generally obtain a three-month extension…