Gappa, the Triphibian Monster
大巨獣ガッパ (original)
An expedition in the South Pacific lands on a tropical island where the natives worship the mysterious deity Gappa. An earthquake opens up an underground cavern and a baby reptile is discovered inside. The natives warn the foreigners to leave the hatching alone, but they don't listen and take it back to a zoo in Japan. Soon after, moma and papa Gappa start smashing Tokyo looking for their kidnapped child.
Starring Tamio Kawachi, Yōko Yamamoto, Yuji Okada, Kōji Wada, Tatsuya Fuji, Keisuke Inoue, Zenji Yamada, Bumon Kahara, Kōtarō Sugie, Saburo Hiromatsu
It's a action & adventure and drama movie, and has a rating of 4.3 out of 10 from Imdb which is fairly low for this kind of movie.
Watch it here
Not found streaming from Ireland.