More than 80 percent of respondents to an NHK survey think China's increased military activities following US House Speaker Nancy Pelosi's visit to Taiwan will affect the Japanese security environment.

NHK conducted the telephone survey on 2,577 randomly chosen citizens aged 18 or older from Friday through Sunday. Of them, 1,223 people responded.

China has responded to Pelosi's Taiwan visit by conducting military exercises encircling Taiwan. Chinese ballistic missiles are believed to have landed within Japan's Exclusive Economic Zone.

Forty percent of the respondents said they think the developments will significantly affect Japan's security environment, while 42 percent said they will have some effects.

Eight percent said they don't expect much effects from the moves, and 1 percent said they don't anticipate any effects at all.

Asked about a plan to release treated water from the crippled Fukushima Daiichi nuclear power plant into the ocean, 27 percent said the measure is appropriate, while 22 percent said it isn't. Forty-three percent said they cannot say which.

The survey also asked respondents whether they think the world is facing a growing nuclear threat. Thirty-four percent said the threat is growing extreme, while 46 percent said it is somewhat rising. Ten percent said the threat is not rising so much, and 2 percent said it is not rising at all.