You're asking about 昭和 and the number 2 in that context. 昭和 is a Japanese era name (年号) used from December 25, 1926, to January 7, 1989, during which the Showa Emperor reigned. The era name is commonly used in dating events in Japan and in historical references. When counting years within the Showa era, 昭和2 corresponds to the year 1927 in the Gregorian calendar. If you’d like, I can provide a quick conversion table for 昭和1 through 昭和7 (1926–1931) or explain how era names are used in Japanese date notation in more depth.
