Other than a joint Anglo-Japanese action to seize the German naval base at Tsingtao and a few other minor campaigns against German colonies in the south Pacific, I've heard almost nothing about Japanese involvement in the Great War, beyond an aborted plan to send an expeditionary force to Europe. Were they involved in any other major actions?
The Imperial Japanese Navy were relatively involved in the war. During 1914, they assisted with the hunt for surface raiders in the Pacific - the armoured cruiser Ibuki escorted the New Zealand contingent of the ANZAC force as it crossed the Pacific, and was nearly despatched to destroy the German cruiser Emden. The IJN also deployed a force to the Mediterranean. This consisted of 12 destroyers and two cruisers, arriving in two separate groups - one in April 1917, and another in August. Two British destroyers would also be handed over to them. This force operated out of Malta, escorting troop convoys in the Mediterranean. They weren't really involved in any major actions, but greatly impressed the British. The readiness rate of the Japanese force was considerably higher than that of any other Allied navy, including the British. The Japanese destroyers suffered a single major loss, when Sakaki was torpedoed by the Austrian submarine U-27. Sakaki didn't sink, but the torpedo struck forward, at a time when the mess hall there was crowded. 68 Japanese sailors were killed.