The PIAAs are toys — like most of the stuff PIAA sells, they're not built to any recognized technical standard (neither the American SAE nor the Euro/international ECE). Japan's lighting regulations are very lax. This will change in the future, since Japan has started the process of adopting ECE regulations. But for now it's pretty lax. The Japanese don't like or want DRLs; they grudgingly allow them but have a spec max of 200cd, which is less than half the intensity threshhold above which DRLs are actually effective. For reference, SAE standards call for 500 to 7000 cd from a DRL, and ECE regs call for 400 to 1500cd.
And that's without getting into the other issues with PIAA's toys: generally overpriced and underbuilt. Most of their $$$ goes into marketing, packaging and promotion; the real lighting companies spend their money on R&D and engineering (but the packaging's not very sexy...)
Valeo had a neat Cibie LED DRL sized and shaped to fit directly in place of Valeo's "FogStar" fog lamp, which is used on a whole bunch of different cars all over the world. But in typical Valeo fashion, they've made it almost impossible to actually buy them.
