Pilot just announced that 12 inks from its premium Iroshizuku line will be released in cartridge form next month. (Prior to this, only its basic ink colours could be had as cartridges.) Iroshizuku inks are extraordinarily good (we have nine different colours); this move will make them accessible to people who can’t or won’t use bottled ink. (Pilot’s cartridges are proprietary: they can only be used in Pilot pens. But with just a few exceptions even their most expensive pens can take a cartridge.) At 900¥ (before taxes), a box of six is three times the price of their regular cartridge pack, but not ridiculous compared to premium brands: regular Pilot cartridges are actually pretty cheap as cartridges go. (Also, I’m comparing the Japanese domestic price to the price here: I have no idea whether we’ll be seeing these over here.)