Few more fun facts:

Elementary school students all write kakizome at the end of December. Within the school, each grade will write the exact same thing. They're hung in the halls for all to see. Hundreds of the exact same kakizome.

Many people burn their kakizome mid-January during "Dondoyaki."

The posture, attention and care taken while writing Kakizome is one of the important points. Those, and the outcome of the characters themselves, are all taken into account.

Unrelated, but Japan's officaily chosen Kanji for the year 2024 was "金" which means gold, or money, or heck, even Friday.