Long-range Japanese battleships without long-range sensing

How effective would Japanese battleships have been in action given their emphasis on long-range engagements?

Their guns had reach, but weak radar and sensing prevented the navy from exploiting that range reliably.

Japanese battleships were shaped for long-range action, but their radar and associated systems could not make those engagements consistently practical. A weapon's nominal reach has little value when the fleet cannot find, classify, and track a target at comparable distances. Detection should extend well beyond engagement range so commanders have time to position the force and decide how to use the weapon. Long-range firepower depends on a sensor and command system as much as on the gun or missile itself.