Question: What was created from the Type 30 rifle for the Imperial Japanese Navy as a replacement for their aging Type 22 Murata rifles, with the date meaning the Meiji period according to the Gregorian calendar together with year designations stating the year of the reign of the current Emperor? 
Sentence (from "7.7×58mm Arisaka"): The cartridge was designed to replace the aging 6.5×50mm Arisaka cartridge after seeing the effectiveness of the 8×57 IS heavy machine gun in action in China during 1937.
Relevant evidence: No