A little more information on the Type I. The rifles were made in 1938-1939 under an agreement between the government of Japan and its Axis ally, Italy. It is not clear why these were bought, since Japanese rifle production appears to have been adequate at the time, even for Japan's expanding military.
Some information indicates they were made for the Japanese Navy, which had a need for rifles (the so-called "Japanese Imperial Marines" were really Navy landing parties - Japan never had a Marine Corps as we understand the term). Further, the Navy would not be as inconvenienced by a non-standard rifle as the Army would, with its greater numbers.
In addition to Beretta, Type I rifles were made by the Regia Sezione Fabbrica D'Armi Esercito (RSFAE - Royal Army Arms Factory Department), and Fabbrica Nazionale D'Armi Brescia (FNA). The Regia Fabbrica D'Armi (Royal Arms Factory) at Terni did the design work and made the barrels.
HTH
Jim