He is known as one of the most ardent proponents of nuclear power generation. The Japan Nuclear Technology Institute was set up in 2005 by Ishikawa in order to represent the interest of the nuclear industry in Japan and promote nuclear energy.
People who watched this Asahi TV program were surprised to hear him contradict the official government "narrative" (I hate that word, but in this case it is exactly what it is, a "narrative" as opposed to reality) about the plant accident, even as he continues to insist nuclear power plants are safe and 100 milli-sieverts cumulative radiation is perfectly safe not just for the plant workers but for everyone.
Here are some of the comments he made during the program, jotted down by a viewer as he watched the program, and supplemented later with tweets by others. He weaves his own narratives like "no one anticipated such an accident" (oh yes many people did). Original in Japanese, my English translation, [my comment in italic in square bracket]:
"It's an accident that no one in the world anticipated.
"If an Act of God happens all the time, it's no longer an Act of God."
[Literal translation of the Japanese word 天災 is "calamity from heaven", a calamity that mere mortals have no control over. The government, the industry, TEPCO are therefore guiltless.]
"The Fukushima accident never would have happened without tsunami."
[Nice try, Mr. Ishikawa. But it was a power failure caused by the earthquake that triggered the accident, and the only transmission tower TEPCO owned that fell during the earthquake was the one that supplied power to the plant. More later.]
"If the power was restored within 8 hours, we wouldn't have the situation we have today."
[Yeah? How could the power have been restored in 8 hours?]
"The accident didn't happen because of the earthquake or the aging plant."
[Yes it did.]
"A nuclear power plant lasts not just for 30 years, but for 60, 100 years."
"At Fukushima I Nuke Plant, they've been applying minor countermeasures as if it is a normal situation. They need the emergency response."
Right now, it's the war with radiation. TEPCO's response is horrendous.
Fukushima I Nuke Plant is at war, it's a war zone.
The government announcement is wrong. I think all the fuel rods have been melted down.
Don't bother with water entombment. Focus on cooling the core as soon as possible.
(Responding to the idea of introducing trailer houses in the earthquake/tsunami affected area, with a smirk on this face) Another tsunami will come.
It's wrong to evacuate people at mere 20 milli-sieverts. It's safe up to 100 milli-sieverts, so let them go home.
Nuclear plant workers are safe up to 250 milli-sieverts.
(Responding to the question whether it is TEPCO or the Japanese government who has promoted nuclear power) Not TEPCO. It's the government.
No need to stop Hamaoka Nuke Plant [the one on the earthquake faults and in the supposed center of Tokai quake]. It is built strong. Fukushima survived a Magnitude 9 earthquake. [Well, not really.] So, no need to worry about Hamaoka. As long as electricity is available, no need to fear tsunami. [Rrrriiiggghhht. Haven't you heard the news yet, that the nuke plants in Japan do not have adequate backup power supplies to keep cooling the reactors? ]
Among my colleagues, there are those who embarked on the career in nuclear power generation as a revenge against the nuclear bombs [dropped on Japan].
[Well, that revenge has turned out to be the revenge against their own people. How sad.]
For those who understand Japanese, here's the video (part 2 of 11) where he discusses the melted core: