despite photography being almost the national hobby (smoking beats it), I get a few funny looks today, shooting fill flash in glaring sunlight. the suits, in Shinjuku.
here’s the way I have done it since the eighties…set the flash to auto (not TTL), select the widest auto aperture, in this case it’s F5.6. Set the lens to two stops smaller aperture, ie F11. Now the flash will complement but not overpower, the ambient light. Shutter speed can be set manually depending on how or little ambient light you want. for this one I shot at 1/400th. and processed in Nik EFX