Yes its Fully Synth, i was just comparing the TBN and its similar to SDO. Was not actually keen on blends since my application could both use full or semi synth. SemiSynth counterpart of SDO is Mitasu MJ-231 and it got an outstanding 14.0 TBN.

One russian forumer at BITOG quoted..

Some time ago (about 2-3 years or so), businessmen from the Russian Far East created new "Japanese-like" motor oil brands for the Russain market: Mitasu, Takumi, Totachi, Yokki. The oils are blended in Singapore, the trademarks were registered in Japan, have japanese-like names and marketed as "True Japanese product"
Im not sure how accurate the info but it make sense if the market was once overwhelmed by these Jap oils.