Cosmo Air Light remains one of my favorite papers. It outshines Tomoe River Paper in many ways: it is thicker and therefore does not suffer from ghosting; it has a smooth surface and is pleasant to write on, much like Tomoe; and it enhances sheen and shading even better than Tomoe (although that can mean longer dry times). I realize that one of the things people (me included) love about Tomoe River Paper is how thin and light it is. That's a great quality for planners, because it keeps them thinner overall. But for journaling, I think Cosmo Air Light is a better choice because you can write front and back without your writing showing through.
The Musubi Cosmo Air Light Folio Notebook retails for approximately $25.00 (35 Singapore dollars). You can get it with plain pages, lined pages, or cross grid with page numbers. It doesn't have many bells and whistles--no ribbon bookmark or pockets or elastic closure, but I love its minimalist design. I've never seen a notebook with so little branding. It's elegant, beautiful, and functional. And, sometime in 2021, Musubi is planning to release covers for their Folio Notebooks in the beautiful materials they use for their handmade notebooks. I can hardly wait!
(Musubi provided the Cosmo Air Light Folio Notebook to Pen Addict free of charge for review purposes.)