These photos were taken at Toyonogata back in July. A tricky subject. Fast flying and rarely came into range.it/they would totally disappear out of range then zoom by. Not sure if there was just one or a couple. Appeared to be chasing smaller dragonflies. I think the best I can do is identify it as a Lesser Emperor, Anax parthenope. I feel there is a tinge of red at the base of the tail which is different to my references though. I’ve included some so-so images just because they are at slightly different angles.