Three Chinese naval warships were observed transiting the Tsushima Strait en route to the East China Sea, prompting close monitoring by Japan amid regional tensions.

Three People’s Liberation Army Navy (PLAN) warships were spotted transiting the Tsushima Strait en route to the East China Sea last week, as Tokyo closely tracks such passages amid heightened regional tensions. The vessels were two Type 055 guided-missile destroyers and a Type 052D destroyer, according to Japan’s Ministry of Defence and Self-Defence Forces on Saturday. The ministry said the Japanese force’s JS Ootaka conducted “alert surveillance and intelligence gathering” on the Chinese...