In the UK, buying a pen from Japan

I live in the UK and am looking at buying a pen from Japan as it seems cost effective.

But, from those with experience of doing this, what could be the charges / duties that I’ll incur?

The pen will be £120 (Platinum Century Black Diamond UEF) so comes under the £135 listed as the value when import duty would be due.

But would I be chased for VAT at this value?

This should (could) give a ~£50 saving over buying here in the UK, especially bearing in mind that the pen from Japan comes with an ink converter as well.

Any advice / experience appreciated.