This was Masaaki Tezuka's follow-up to his three entries in the Millenium Godzilla series: Godzilla x Megaguirus; Godzilla Against Mechagodzilla; and Godzilla: Tokyo SOS.
The fascinating thing about this movie is how much it feels, stylistically, like those movies (at least in the scenes that involve the JSDF). In fact, I can easily imagine this movie taking place after the events of GxM, as it features a similar level of military malfeasance and pseudo-mad science.
"We just defeated Godzilla with the black hole. What now?"
"How about we develop magnetic shields against plasma spikes?"
"OK!"
"But there's a problem."
"What?"
"Now we've accidentally opened another rift in the time-space continuum."
"What?"
"And giant holes are forming all over the world that threatening to devour reality itself."
"WHAT!!!???"
My full review can be read here.
Toho Kingdom Page = https://www.tohokingdom.com/movies/samu ... o_1549.htm