A Tsunami washed T-4(26-5626) finished its repair and had test flight on Jan.24, 2013, at Matsushima A.B..
When the tsunami struck to the base on Mar.11, 2011, this T-4 was at the washing hanger where is a bit higher place than the other area. So the damage was light and could repair by the base maintenance crew.
The work started on Aug.20, 2012.(Source: Asagumo-Shinbun(JSDF News paper) on Feb.7,2013)
Further, the MINDEF of Japan requests the budget for the repair of 7 more tsunami-washed F-2Bs in 2013.
(They've already got the budget for 6 F-2Bs repair in 2011.)
It will be decided by the June 2013.(Source: MINDEF-Japan, The Buget plan of 2013)