Siberian Blue Robin "Ko-ruri" in Japanese. Also summer visitors (we had a large population passing moutains near the University last spring). Breeds in mountains. Songs similar to robins.
Red-flanked Bluetail "Ruri-bitaki" in Japanese. Breeds in high mountains, spends winter in low mountains and their surroundings. Often met near the University in winter. One of rare visitors for European birders?
(To be continued?)