Mitsubishi Pencil Mechanical Pencil Kurutoga KS 0.5 Bright Yellow M5KS1P.BRY

It’s a mechanical pencil from uni, the Kuru Toga KS. Color is called bright yellow, or M5KS1P.BRY. There’s also a cream yellow, or plenty other colors to choose from. https://www.amazon.co.jp/-/en/gp/aw/d/B0DGT4XY4R