Roughly speaking, Japan has just 2 seasons. They are called too-hot and too-cold. This is a bit of an approximation. At this time of year, and also between May and June, there are alternating days of too-hot and too-cold, and sometimes it is even possible to be both too-hot and too-cold during the same day.
The poor insects are, however, definitely too-cold and are blundering around. Don't know how this katydid arrived on the flowers, but it was none too steady on its pins.
Matilda, the giant mantis [I guess a Chinese Mantis (Tenodera sinensis)] who has been hanging out on our wisteria for the last few weeks, is showing signs of wear and tear from her predatory lifestyle. She has one antenna shorter than the other. But that's not bad at all - missing limbs are not uncommon at this time of year.