写経
Sutra copying is the East Asian practice of hand-copying Buddhist sutras.

般若心経
The Heart Sūtra (Sanskrit: प्रज्ञापारमिताहृदय Prajñāpāramitāhṛdaya) is a famous sūtra in Mahāyāna Buddhism. Its Sanskrit title, Prajñāpāramitāhṛdaya, literally means “The Heart of the Perfection of Understanding.” The Heart Sūtra is often cited as the best-known and most popular Buddhist scripture of all.