The nation you cited as your resident nation is only 45 days old while the nation you used in your citizenship oath has been out of the region for over 60 days.
As for the legality of it, Osamafune's forum access is not being restricted in any way. The constitution states:
1. Any resident shall be capable of obtaining citizenship in Taijitu, and shall maintain this citizenship unless they violate any of the conditions enumerated herein or are found guilty of having violated the laws of Taijitu by the Supreme Court.
1. Citizens shall maintain a resident nation residing within Taijitu. Citizens shall disclose their resident nation and UN nation.
2. Citizens shall swear by the oath of citizenship provided by the Senate.
Since there was a period of time Osamafune did not have a resudent nation for period of time the first ocndition was violated and citizenship could not legally be maintained