Really? I had to ship C-41 developer to a chap in Japan, because he couldn't get his hands on it.
I thought you're doing B&W film developling, although I understand the Darkless kit allows you to do the color processing as well.
What I was going to suggest was that in Japan, in average, for 4,500 yen, (or around 40 USD) you can get a new two-reel plastic developing tank (comes with two 35mm reels) made by AP from any camera store you go to: Yodobashi, Bic, Kitamura, etc. This tank is almost the same as Patterson's one, which you might (or might not) be more familiar with. But In the Japanese market, Patterson products are usually pricier and harder to find new these days. The official importer for Patterson has stopped carrying the stuff since last year.
For B&W photo chemicals, let's say, Fuji SPD, which is a very general film developer, for 1L mix, is less than 200 yen per package. It comes in power, so you mix with hot water (and let it sit for overnight and use it). If you want Kodak's I quart mix of something like D76, you can get it also. It's a little more expensive, but not that much more.
You can use any fix, but perhaps the one with hardner in it. Fuji has a liquid type of this kind that's for a 3L mix, and is, I forgot exactly, but less than 1,000 yen a bottle. You can get Kodak and/or Ilford fix of a similar kind with a harder in a separate bottle, etc.
You need Hypo-Clear, which if you buy Fuji's powder stuff, it's like 50 yen for a 3L mix. And for photoflo, you can use Fuji's Driwel, which does the same job and costs less than 300 yen per bottle, but you won't run out of this so often because you dilute it so much.
You know it depends on how you use the chemicals, and you can save/reuse them more than once to be economical and eco-friendly. Meanwhile when I read the comments on the Darkless kit somewhere else, I had an impression that it was indeed more costly and inefficient than the regular film-developing kit. I just wanted to point that out basically...
For little stuff such as plastic containers and timers, etc, you can check out any 100-yen shop (the equivalent of Dollar Store) and you'll be shocked that how many items you can actually buy there to use. If not, go to DIY stores and find what you need.
