Lonicera affinis Hook. et Arn.

Family: Caprifoliaceae
English: (Beach?) Honeysuckle
Japanese: ハマニンドウ (浜忍冬）) [Hamanindō]

This honeysuckle blooms around the same time as A. hypoglauca. A. affinis has less pointy leaves and usually is not covered with hairs [?]. (In fact, I'm not 100% sure I've identified the one in this photo correctly, as I forgot to label it immediately.)

References:
九州野山の花 片野田逸朗,2004：南方新社
米倉浩司・梶田忠 (2003-)　「BG Plants 和名－学名インデックス」（YList），http://ylist.info（ 2019年8月14日）