クワガタ虫 kuwagata mushi, Japanese for stag beetle
Wikipedia article

“Tawashi” are various types of scrubbers which could be used to clean dishes, windows, and other household items.

Pattern is Japanese but fully charted using standard crochet symbols. The black triangle symbol in the chart means there will be a decrease by skipping the next stitch below, and is not an actual crochet stitch.

Hook: Japanese size 7.5/0 = 4.5mm, between US G-6 (4.0mm) and US H-8 (5.0mm).

Yarn (Hamanaka Bonny):
Black 黒 (402) 20g
Charcoal Gray チャコ—ルグレ— (481) 2g