heh...you've really done some research I see! I'm kind of curious though, why you chose Japanese products - are there none available wherever you are?
anyway, about pogona club...well, I did find what appears to be their website, and it seems to be on permanent maintenance?? of course, I've never been to their site before, but...while it says they have put the page on "maintenance status" due to the fact that they are moving the page somewhere else, no other page popped up in my search, and the last *NEW* update link on that page is dated sometime in 2006.
I did find the cricket diet you mentioned in several web-stores, but none of them had an ingredient list, so I figured the one way to go would be to check the homepage of the manufacturer...as you know now, I had no luck with that (all but one link on the page are dead)...sooo...there is a mail link on the old website and I went ahead and sent them a mail to see what's going on...let you know what I find out as soon as I get a response.
to offer a comparison I checked the ingredient list of the cricket food available at the store I usually go to and it goes something like this:
this product contains corn, defatted soybeans, fishmeal, milk, brown sugar, with added protein, calcium and "other" stuff...
this is the way ingredient lists here usually are - if you are lucky enough to get one - because while things are slowly changing for the better, in a lot of places here the idea of "trust the professionals, they know best and you wouldn't understand anyway" still holds in many fields.
apparently the law doesn't require full ingredient lists in many cases (even food), so especially pet/animal foods are labeled poorly and "other" is a common ingredient! (more so if you are keeping "weird" pets like reptiles;-))
for that reason I choose to make my own cricket food, but then I have only a few reptiles here who eat crickets, so it's not much effort to keep a couple of hundred crickets a month fed...
here's a fun thing that may explain the "interesting" challenges you may face here in Japan when buying "odd" stuff...
I decided to research the maker of the calcium supplement you found since tortoise style is just the supplier, and this is where it gets interesting...
the makers name is "mic animal create" and their website lists exactly three products - none of which are the one you are interested in! (though it does seem the last time the page was updated was in July of 2007)
they clearly do their research, there are pages upon pages showing exactly what kind of research they did to what effect, so it certainly seems they are a reputable company, though whether they discontinued the supplement you named and you are getting leftover stock, or this is a new product and they simply haven't added it to their website yet - I have no idea!
one reason for this glitch in the websites of both companies I checked for you may be that they are part of the still common small companies who do things the old-fashioned way, have no actual employees to handle web marketing and so simply rely on outside help to make a homepage every once in a while? no idea...
anyway...this is what I found so far, but I'll keep searching for you if you like (once I get back from fishing this weekend...;-))