Japanese flying boats and the payload needed for naval logistics

Why buy Japanese long-range flying boats instead of reintroducing the Catalina?

The Japanese aircraft are preferred because they can carry larger loads of components and other logistical supplies while complementing P-8s.

Japanese long-range flying boats are proposed as an addition to the P-8 force in the hypothetical US Navy programme. The Catalina remains an appealing older design, but the preference is for the greater carrying capacity of the Japanese aircraft. Components and other logistical loads are the practical reason for choosing them.