second island chain
- (politics) The next chain of archipelagos out from the East Asian continental mainland coast, beyond the first island chain. Principally composed of the Bonin Islands, Marianas Islands, Caroline Islands; from Honshu to New Guinea.
Some definitions of the second island chain anchor the northern end on the Kamchatka Peninsula, with the first link on the chain being the Kuril Islands, through Hokkaido and Honshu. The inclusion of the entire Indonesian Archipelago from New Guinea to the Malay Peninsula is also sometimes included. The southern end of the chain is also sometimes considered to be anchored in Australia.