Janmāru-Tataru

was a contemporary of the Sage of Six Paths. He founded the Astronomy Research Institute.

Background
Tataru established the Astronomy Research Institute high in the mountains, just beyond the northern border of the Land of Redaku. One day he met the Sage of Six Paths, who was searching Redaku for a way to cure damage to his chakra pathway system caused by his time as a jinchūriki. Tataru took the Sage in and, despite having no medical training, offered to help him. On the night that the Sage would ultimately be cured, a shooting star passed overhead, which the Sage caught and cut in two using only his chakra. One of these halves immediately dissolved into dust, which Tataru dubbed "polar particles". The dust enveloped the Sage and healed his body.

The Sage immortalized Tataru as the "shepherd" in Hoshinarabe, a card game he created that could be used to track down some of the leftover polar particles he hid near the Institute.