Do you mean what are each dish? Apart from the mochi (pounded rice cake) and the slices of roasted potatoes with black sesame at the top right, you can find the typical dishes and their meaning here:
justonecookbook.com/osechi-ryori-japanese-new-yeaβ¦.

Osechi Ryori (Japanese New Year's Food) γγγ‘ζη
The Japanese celebrate New Yearβs Day with traditional and symbolic New Year foods called Osechi Ryori (εΎ‘η―ζη). Here are some popular dishes.
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