japan's chief negotiator from the foreign ministry, shinsuke sugiyama, flew out on tuesday. leaders in tokyo pushed for these in-depth talks. analysts from the three countries have already been sharing key information on north korea. south korea's chief negotiator, lim sung-nam, also traveled to the u.s. capital. >> translator: i would like to step up diplomatic efforts with the united states in a bid to prevent north korea from launching a missile. >> sugiyama and lim will be meeting up with glynn davies, the u.s. special representative on north korea. the three senior diplomats are expected to demand north korea exercise restraint and will likely refer to a u.n. security council resolution banning such activity. they're also expected to discuss

japan's chief negotiator from the foreign ministry, shinsuke sugiyama, flew out on tuesday. leaders in tokyo pushed for these in-depth talks. analysts from the three countries have already been sharing key information on north korea. south korea's chief negotiator, lim sung-nam, also traveled to the u.s. capital. >> translator: i would like to step up diplomatic efforts with the united states in a bid to prevent north korea from launching a missile. >> sugiyama and lim will be meeting up with glynn davies, the u.s. special representative on north korea. the three senior diplomats are expected to demand north korea exercise restraint and will likely refer to a u.n. security council resolution banning such activity. they're also expected to discuss plans of action in case the launch happens. the diplomats are likely to request the security council to issue a strong condemnation. >>> police in central japan are trying to find some clues as to why a highway tunnel collapsed. they've searched the headquarters of the company that operates the highway. police suspect officials with

. >> sugiyama said he hopes to visit beijing to discuss the matter with chinese officials. >> they're ignored warnings over the year when they went ahead with a launch that ended in failure. covering the korean peninsula, we see why leaders in the north are pushing ahead despite opposition. >> reporter: the ballistic missile launch will be the second since kim jong-un took power a year ago. it will use the same launch pad, a site in the northwestern part of the country. before the first testing, officials said the three-stage rocket was meant to carry a satellite. but japan and the u.s. and south korea said the launch was about a missile test. the launch was a missile test. the test ended in failure with a rocket exploding in mid-air two minutes after. it fell into more than ten pieces and fell into the ocean. analysts say the leader wants to collect his failures before the first anniversary of his father's death on december 17th. kim may be trying to consolidate his power by showing dedication. kim has also vowed to develop north korea's economy. >> translator: we must stop on a part