The assessment is based primarily on the highest authority and most relevant source, the official "Service Changes for Japanese Residents" announcement from Bybit itself. This primary source directly confirms that there will be service changes and restrictions for residents of Japan. While the provided summary does not explicitly state the 'late March' timeline, an official announcement of this nature is the precise place where such a timeline would be detailed, making it highly probable that the full announcement supports the entire statement. This core evidence is further corroborated by a post on X, which, despite being a lower-authority source, directly states that Bybit announced it would be phasing out its services for Japanese residents. The other highly authoritative source, Bybit's "Service Restricted Countries" page, also supports the general premise of restrictions. There are no sources that contradict the statement. The remaining sources are either irrelevant to the claim or provide only general, non-specific context. The existence of a direct, official announcement is definitive evidence that restrictions are being implemented, making the statement highly likely to be true.