Robert,
It is not really a sansaku boshi, it is more like some kind of classical boshi where the hamon enters straight in the kissaki and then is perfectly parallel to the cutting edge. The typical sansaku boshi is generally pointed and is rather straight or inward curved fom entering the kissaki then goes straight to the point before turning back.
If you want examples of what is a sansaku boshi, take Markus Sesko book, Koto Kantei, and look at Nagamitsu oshigata.