SECRET OF THE TELEGIAN
I am not much of a fan of director Jun Fukudas Godzilla films (see bottom of page). That said, Secret of the Telegian, which was made before he signed onto the Godzilla franchise, works quite well. Fukuda approaches it as a crime film where the heroes are detectives and a determined reporter. It is interesting to see the backdrop (in the early parts) of what are clearly Tokyo gentlemans clubs. The most interesting aspect is villain Tsudo Tsudo whose teleported appearances look like a grainy and not properly focused hologram. (Although these are unevenly applied hologram-like in some two shots, while in others or shots that take place from behind, he is seen as a regular human figure). Despite the term telegian in the title, this is never actually used throughout the Japanese title Denso Ningen translates as telegraph human.
Almost all Toho films from this period have some kind of heavy message subtext. The one here would seem to be making a point about those who have exploited from the War with a subplot about the villains being those who stole gold for the war effort and used it to line their own pockets and justice being exacted by Tsudo who stood up to say that the gold belonged to all the people and was shot for doing so.
Secret of the Telegian was the second film directed by Jun Fukuda, a former assistant director at Toho, who later became a regular on the Godzilla series. Fukudas Godzilla films include Godzilla vs the Sea Monster/Ebirah, Horror of the Deep (1966), Son of Godzilla (1968), Godzilla vs Gigan/Godzilla on Monster Island (1972), Godzilla vs Megalon (1973) and Godzilla vs the Cosmic Monster/Godzilla vs the Bionic Monster/Godzilla vs Mechagodzilla (1974). These are generally regarded as the point where the Godzilla series became silly and juvenile, no longer taking itself seriously. In genre material, Fukuda also made Espy (1974) about a team of government psychics and the space opera War in Space (1978).
Trailer here (no English subs):-