pacific command and japan's defense minister, nakatani. from nakatani, a call from both countries to work on the issue. from harris, a mission to conduct more freedom of navigation in the south china sea. but this expert says china's reaction is a response to what the u.s. has been doing. >> translator: after the second freedom of navigation operation near the spratly islands, i think there was no doubt that china would take some kind of counter measure. i think china will avoid the conflict with the u.s., but if the u.s. keeps military pressure on china and these things keep happening, china may also take military countermeasures. >> reporter: the news of the missile deployment came as u.s. president obama and southeast asian leaders agreed to cooperate to ease tensions in the south china sea, but the tensions are rising. kurando tago, nhk world. >>> south korean officials are trying to gather intelligence on possible cyberattacks and terror strikes by north korea. they say they have information that kim jong un has ordered preparations f

. >> nakatani says china's action are a cause of concern for the international community. >>> turkey's government is blaming syria's kurdish forces for an attack in ankara. nhk reports. >> reporter: the blast at killed 328 and injured dozens more. i'm near the site of the explosion. as you can see, police officials have everything sealed off. this is a normally busy area. the parliament is near here. so are many government offices and military facilities. >> translator: i want these terrorist attacks to end. the government needs to take tough ever measures. >> reporter: the turkish prime minister said a man linked to theyrian kurdi mility h be identied a theuicide bomber. >> transtor: tkey will track wn all those who are involved in the attack and bring them to justice. >> reporter: kurdish forces in syria have told nhk that they have absolutely no involvement in it. turkey had suffered a spate of terrorist attacks over the past months. some have been blamed on islamic state militant group. others on another kurdish group. this one, a separatist group had been fighting for independence

. >> nakatani says japan will keep monitoring china's activity in the south china sea. >>> space researchers have launched a new tool in space. nhk takes a look at how it works. >> reporter: this is dubbed a national observatory in space. it's capable of detecting x rays that cannot be observed from earth, because the atmosphere. it's up to 100 times more sensitive to such rays than the conventional satellite. it will observe activity around black holes that cannot be seen by the eye. black holes are places in space with such strong gravitational pull that even light cannot escape. astronomers believe some of them are spewing out jets of hot gas but cannot observe what's happening. japanese researchers say close analysis of the x rays detected will help them identify the gases escaping from black holes. they say they'll also be able to find out the direction and speed of the gases. >> translator: i hope the satellite will shed more light on when and how black holes emerged. >> reporter: one of the instruments is a high-performance telescope. the inside is made up of 200 radius of mirrors, wi