Assuming that I understand your question correctly -Was it the same on other Japanese destroyers, or did they have single 13.2 guns?
At the outset of the war, only the classes prior to the Fubukis carried any single 13.2mm guns, IIRC. The exception was the Type III Fubukis; they had two single 13mm guns mounted midships, on either side of the deckhouse, inbetween #2 funnel and the RDF/searchlight compartment.
During the war, there were undoubtedly many adhoc instances of DDs carrying single 7.7mm or 13.2mm guns. For instance, there is that well-known photo of Shirayuki at the Bismarck Sea with a 13mm atop a TT mount, surrounded by sandbags.
Shirayuki also shows that many of the Type Is were modified either immediately pre-war or early on to carry two twin 13mm mounts on a revised platform in front of #1 funnel.
Late in the war, destroyers across all classes could carry a mix of 13.2mm and 25mm single mounts.
