Tomoe symbol? I haven't seen this before; can you explain?
This is what I have learned about it so far based on what I've seen on the net:
Tomoe (巴, also written 鞆絵),[a] commonly translated as "comma", is a comma-like swirl symbol used in Japanese mon (roughly equivalent to a heraldic badge or charge in European heraldry). It closely resembles the usual form of a magatama.
The tomoe appears in many designs with various uses. The simplest, most common patterns of the device contain from one to four tomoe, and are reminiscent of similar designs that have been found in wide distribution around the world. When circumscribed in a circle, it often appears in a set of three, with this design known as the mitsudomoe (三ツ巴).
Some view the mitsudomoe as representative of the threefold division (Man, Earth, and Sky) at the heart of the Shinto religion. Originally, it was associated with the Shinto war deity Hachiman, and through that was adopted by the samurai as their traditional symbol.
It is also commonly displayed on banners and lanterns used in festivals and rituals related to Amaterasu-ōmikami, who in the Kojiki confronts her brother Susanoo when he usurps her terrain on earth by dressing as an archer, adorned with magatama beads and 'an awesome high arm-guard' (itu nö takatömö).
A third element of its symbolic panorama concerns water, an association engendered by its swirling pattern. For this reason, it is said to be located on roofs and gables as a charm against fire.
The mitsudomoe symbol once signified the three treasures of Buddha.
