פתיחת השנה
akemashite omedetou gozaimasu 開けましておめでとうございます is a greeting on the first few days after the new year "opens" so it really means congratulations for the opening of the new year”, but it is the most popular greeting for Japanes new year. As for SHANA TOVA as a direct translation , a way of greeting that is not very common in Japan you could say "yoi otoshi wo" whice ,means HAVE A GOOD YEAR and in Japanese letter it will look like this 良い御年を