Having read this thread I wasnt expecting F access at HND this morning and this was reinforced when, at checkin, the agent and lounge pass said it was for the Sakura / business lounge...

However, on arrival at the lounge, I showed the (Sakura) lounge invite to reception, after which she asked for my BP - scanned and then pointed me to the F lounge

Nice lounge with little cubby holes. Food looked comparable to the NRT F lounge - I didn't bother as I'd already eaten landside.