Question: The Yokosuka B4Y, (Navy Type 96 Carrier Attack Bomber), is an aircraft carrier, and torpedo bomber was used by the Imperial Japanese Navy Air Service from 1936 to what year?
Sentence (from "Yokosuka B4Y"): The B4Y replaced the Mitsubishi B2M2 and was the last biplane bomber used operationally by the Imperial Japanese Navy.
Relevant evidence: No