The Janma Rashi is the sign occupied by the moon in the birth chart. Following are the Rasi mantras :

Aries - Om Vishnave Namah

Taurus - Om Vasudevaya Namah

Gemini - Om Keshavaya Namah

Cancer - Om Radha-Krishnaya Namah

Leo - Om Hariharaya Balamukundaya Namah

Virgo - Om Hrim Pitambaraya Paramatmane Namah

Libra - Om Sri Ram Dasrathaye Namah

Scorpio - Om Narayanaya Namah Om Naraya Namah

Sagittarius - Om Hrim Shrim Krim Dharani Dharaya Namah

Capricorn - Om Shrim Vatsalaya Namaha

Aquarius - Om Shri Upendraya Achyutaya Namah, Om Krim Govinda-Gopalaya Namah

Pisces - Om Krim Rathanga - Chakraya Namah