Junami (also known as Milwa - thanks to Richard Wheeler for correcting this) is a modern apple developed in Switzerland, and derived from a cross between Idared and Maigold, which is then crossed with Elstar. The result is an apple which has the very long keeping qualities of Idared, and an appearance similar to Elstar.
The flavour is also reminscent of Elstar, slightly perfumed, and with a similar balance of sweet and sharp. The flesh is fairly light, and soft but with some crispness - a good choice for those who do not like very hard apples. This is definitely a variety that is best eaten slightly-chilled from the fridge.
Junami makes an interesting comparison with the new Rubens apple, which is effectively a half-sibling variety - Elstar is the common parent.