This was announced this morning in Fujiya's Facebook (along with Fostex TH-600 which funnily made it to Head-Fi but not the HP-V1).
Anyway The HP-V1 is Fostex's first portable tube amp. There's not much info about this amp except :-
- that the shell is also the heatsink
- has a high/low gain switch for IEM and for higher impedance cans
- has input analogue front and back for convenience
From the picture I would have thought it supported both 3.5mm and 1/4" out however with their comment of having analogue input front and back (and I only see 1x3.5mm in the front), I'm not certain. I'll get to find out tomorrow since the prototype will be at Fujiya's Portable show.
Although Fostex's news page doesn't state a price, on the Fujiya blog there's a price of Y50,000 mentioned/rumoured (USD$535).