Connectivity evaluates stochastic processes of larval dispersal due to chaotic coastal circulations (e.g., Mitarai et al., 2009). In the present study, we quantify Lagrangian PDFs and connectivity using many Lagrangian particles released from 140 source sites in the modeled SIS circulation field in a double-nested, high-resolution ROMS configuration (Uchiyama et al., 2012). In winter, the fraction of particles transported to another region is about less than 40% except for both the channels, suggesting that particles largely remain in the release region. The regional connectivity is correlated with the seasonal variation of the mass fluxes at the straights between two neighboring regions. Particles released from Harima-Nada, representing larvae of marbled sole, are mainly transported towards the northern shore of Shodo Island, while particles arriving there originate mostly from the western shore of Harima-Nada.
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