There's info right here https://www.amazon.com/dp/B000I430SW?psc=1&ref=ppx\_yo2ov\_dt\_b\_product\_details
It probably doesn't help you but I'm just a simple Campus enthusiast.
https://www.amazon.com/Kokuyo-Campus-Notebook-Semi-9-8%C3%97/dp/B000I430SW/
I'm not sure what your budget is, but getting one or two items from this list seems like a super nice gift. Here's a little list of what I could find on the UK Amazon:
- https://www.amazon.co.uk/books-Roh-3CBX5-pieces-Kokuyo-Campus/dp/B000I430SW/ref=sr_1_2?dchild=1&keywords=kokuyo+campus+notebook&qid=1600870668&sr=8-2 These notebooks are what lots of Japanese high schoolers haha, I practically hoarded them last time I visited Japan. Super nice.
- https://www.amazon.co.uk/Zebra-MILDLINER-WKT7-5C-Fluorescent-5-Colour/dp/B0027MDL3C/ref=sr_1_8?crid=EWWGO2I5HR8W&dchild=1&keywords=zebra+midliner&qid=1600870720&sprefix=zebra+mil%2Caps%2C288&sr=8-8 These highlighters are a godsend (everybody I know has these) but if these go out of stock, I think these can be delivered quickly as well: https://www.amazon.co.uk/Zebra-liner-color-WKT7-5C-RC-japan/dp/B002G5QOR0/ref=sr_1_9?crid=EWWGO2I5HR8W&dchild=1&keywords=zebra+midliner&qid=1600870720&sprefix=zebra+mil%2Caps%2C288&sr=8-9 . You could probably just get her the whole highlighter set if you search Zebra Mildliners if she's into that kinda stuff.
- Uniball pens are great in general if she needs pens, Zebra Sarasa Clip is good too: https://www.amazon.co.uk/Uni-Ball-Eye-Fine-Rollerball-Pens/dp/B076KQN613/ref=sr_1_2_sspa?dchild=1&keywords=japanese+pens&qid=1600870931&sr=8-2-spons&psc=1&spLa=ZW5jcnlwdGVkUXVhbGlmaWVyPUE4V1VKODJDV0cySkgmZW5jcnlwdGVkSWQ9QTAwNjU1NDIzMFFRMElMSlgyNVEzJmVuY3J5cHRlZEFkSWQ9QTA0MDQyMjRNWEUzVTZZNDBESjMmd2lkZ2V0TmFtZT1zcF9hdGYmYWN0aW9uPWNsaWNrUmVkaXJlY3QmZG9Ob3RMb2dDbGljaz10cnVl
- I have a few of these, but I prefer the self-refilling/shaking lead pencils: https://www.amazon.co.uk/Zebra-Delguard-Mechanical-Pencils-Barrel/dp/B07PRJJKCT/ref=sr_1_27?dchild=1&keywords=zebra+lead+pencil&qid=1600871023&s=officeproduct&sr=1-27 . The kurutoga lead pencils seem to be pricey in the UK.
If you have a MUJI near you, they have lots of nice stationery as well. Happy shopping and I'm sure she'll love anything you get her.