Thanks for adding the Idemitsu type H+ VOA and to the Aisin VOA done by member
dan_erickson and the spreadsheet comparison. Same as with the Aisin product, as noted VOA shows Idemitsu H+ to NOT be the same as DW1.
When H+ been discussed on the ATF board in my observation it has been implied if not stated that because DW1 is allegedly sourced from Idemitsu, that H+ was/is the same product. Using this VOA as basis, clearly that is not the case. As can be seen, there are significant add pack differences in Boron, Ca, Phosphorus, Magnesium and Zinc. Given those facts, not only would I say it a not DW1 clone, imo not that similar at all. Also seems that while some willing to take a leap of faith that because a product may be sourced same as an OEM fluid, or labeled in way that appears to imply it's the same, doesn't always make it fact.
All that said, doesn't mean if the price was right for either the Aisin or Idemitsu product that I wouldn't use it in my Honda applications, I would. However, seeing as I've been using readily available MaxLife MV in a couple Hondas for many miles and years, and satisfied, it would have to be in the ~$18/ gal range to pique my interest. My .02
Thanks again for your efforts.