Funny coincidence... I have been on a Godzilla watching binge lately, and I just got to Terror of Mechagodzilla last night. I was amused to see the submersible that encounters and is sunk by Titanasaurous is named the Akatsuki. In typical Showa-era style, they immediately whip up another sumersible, which they just call the Akatsuki II.

I can't help but think that Akatsuki wouldn't be all that thrilled to go out again. :)