Phedimus kamtschaticus

This picture was taken in-situ when i went on a 2 weeks vacation (. No, i did not travel to an exotic place called Kamchatka in the far eastern Russia. It was taken at Utoro near Shiretoko national park at Hokkaido, Japan. Frankly, i never heard of this small town. It serves as a getway to the Shiretoko national park and cruiseliners take tourists out to tip of Shiretoko peninsula (Cape Shiretoko) from this point. It is growing on coastal rocks around cruiseliner pier in full sun. I lift this description from Flora of China 8: 218–221. 2001.

Phedimus kamtschaticus (Fischer) ’t Hart in ’t Hart & Eggli,
Evol. & Syst. Crassulac. 168. 1995.
堪察加费菜 kan cha jia fei cai
Sedum kamtschaticum Fischer & C. A. Meyer, Index Sem. Hort. Petrop. 7: 54. 1840;
Aizopsis kamtschatica (Fischer) Grulich; Sedum aizoon Linnaeus subsp. kamtschaticum (Fischer) Fröderström.
Herbs perennial. Rootstock branched, thickened, woody. Stems mostly simple, ascending, 15–40 cm, sometimes papillate. Leaves alternate or opposite, rarely 3-verticillate; leaf blade oblanceolate, spatulate, or obovate, 2.5–7 × 0.5–3 cm, base narrowly cuneate, margin apically
sparsely serrate to crenate, apex obtuse-rounded. Inflorescence terminal. Flowers unequally 5-merous. Sepals lanceolate, 3–4 mm, base broad, apex obtuse. Petals yellow, lanceolate, 6–8 mm, abaxially keeled, apex acuminate and mucronate. Stamens 10, slightly shorter than petals; anthers orange. Nectar scales subquadrangular, minute. Carpels erect, equaling or slightly shorter than petals, adaxially gibbous, base connate for ca. 2 mm. Follicles stellately
horizontal. Seeds brown, obovoid, minute. Fl. Jun–Jul, fr. Aug–Sep.
Rocky slopes; 600–1800 m. Hebei, Heilongjiang, Jilin, Liaoning, Nei Mongol [Japan,
Korea, Russia].

It is so neat and nicely position that on first impression i thought it was planted. Anyway, there are annuals in planted troughs. More of this species growing on other less accessible rocks around that area. They survived winter dying down to a rootstock. I reckon the place will be snow covered for at least 4-5 mths.