Help finding a Japanese word

[dragonsamurai77]

This has been bugging me for a while now; there's a word I've heard in several places now that I really like, but have never been able to find; it means "lightning" or "thunder", and phonetically, my best guess is something like "izcacion" or something to that effect. I've tried Google Translate, to no success (the closest-sounding words I've found are inazuma and inabikari, which I can tell aren't quite it).

If it helps, the places I've heard it:
-Kingdom Hearts: Sora and Larxene both use it when casting Thunder.
-High School DXD: Akeno uses it under the same circumstances during the battle with Rizer.
-Sword Art Online: Thor uses it when introducing himself as the God of Thunder.

It's such a little thing, but it's been bugging me for so long. If anyone knows enough Japanese to figure out what I'm talking about, I'd be very appreciative.

[Alent]

ikazuchi/Ikadzuchi?

http://jisho.org/kanji/details/%E9%9B%B7

It also frequently gets used as Kaminari, too.

[dragonsamurai77]

ikazuchi/Ikadzuchi?

http://jisho.org/kanji/details/%E9%9B%B7

It also frequently gets used as Kaminari, too.

Wow, thank you! [I]ikazuchi yo[/] seems to be the form I've been hearing.