Part of the Osechi Ryori new year food in japan is Ozoni.
Eaten for breakfast on New Year’s Day ( Oshogatsu ) this is the Kansai style ( western japan ) Kyoto/Osaka which Is a white miso based soup with toasted mochi. I used Saikyo Miso which is a sweet miso paste from Kyoto also I added yuzu peel,daikon,carrot,komatsuna and tofu. This style normally has a round toasted mochi where as Kanto has a square mochi ( I only had round mochi ) .
The other style of Ozoni is the Kanto/Tokyo style ( eastern japan ) this is a clear based soup made with dashi known as Osumashi I added some pretty yaki fu to mine along with the toasted mochi and vegetables . I had this soup as part of my Osechi Ryori with my jubako bento box. Made with kombu shiitake dashi and added tamari and mirin,other ingredients could be chicken,fish cake and other fish and seasonal vegetable according to which area of japan you are from.
Of course mine was totally vegan
There is also Tottori Prefecture soup which is a red bean soup and toasted mochi like zenzai (oshiruko)