Most sandy coasts in northern Tohoku, Japan, have been damaged by 2011 Tohoku-oki tsunami, and the sandy-beach vegetation was disturbed extensively. We should consider carefully biodiversity and ecosystem function to restore the local natural resources. Buried seeds largely contribute to vegetation recovery or ecological succession in general. The knowledge of seed-bank will be useful information to estimate resilience mechanism of the vegetation destroyed. However, the knowledge of the impact of the tsunamis on seed-bank of sandy-beach vegetation is lacking because of the infrequency of these events. We examined, therefore, the buried seed populations, using germination tests, to clarify the potential capacity for recovery of species diversity in sandy beaches. Sand samples were collected from ground surface and 30 cm depth (5cm thick) of the sandy beach sediment in Iwate prefecture, northern Tohoku, Japan. The samples (1L, 3~8 repeat per one coast) were laid on seed-free vermiculite and set under light conditions in greenhouse. The species composition and the abundance of buried seeds in the sediment will be shown and compared to above ground vegetation. Then, we discuss the potential capacity for recovery of species diversity and estimate the resilience of sandy-beach vegetation after 2011 Tohoku-oki tsunami.