Question: The Nakajima B6N "Tenzan", was the Imperial Japanese Navy's standard carrier-borne torpedo bomber during the final years of which event, an aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft? 
Sentence (from "Japanese aircraft carrier Hōshō"): The ship provided valuable lessons and experience for the IJN in early carrier air operations.
Relevant evidence: No