How the Tsukuba and Ibuki armored cruisers compared

How did the Tsukuba- and Ibuki-class armored cruisers compare with their contemporaries?

They were capable, well-armed battleship-support cruisers with good seakeeping; Ibuki's turbines improved sustained-speed potential without guaranteeing the highest top speed.

The Tsukuba and Ibuki classes compare well with the large armored cruisers of the Royal Navy and Imperial German Navy. Four 12-inch guns and a substantial secondary battery gave them useful firepower, while their hulls offered good seakeeping. They continued Japan's six-six fleet doctrine, with armored cruisers backing the battleship line. Ibuki remained an armored cruiser in this interpretation, despite a later classification that grouped her with battlecruisers. Her turbines improved the potential to maintain high speed for long periods, although she is recalled as slower than her sister. Early turbine machinery therefore needs to be judged separately for endurance at speed and maximum speed.