Tantra: Kriya, Charya, Yoga and Anutarayoga
Kriya Tantra: There are many Kriya Tantra texts. At the moment I'm working on compiling a list of those included in the Chinese/Japanese Tripitaka.
For now here are some of the major Kriya Tantra texts: Susiddhikara tantra 蘇悉地羯羅經 893, Subāhuparipṛcchā-tantra 蘇婆呼童子請問經 895 妙臂菩薩問經 896, Sarvamandalasamanyavidhi-guhya tantra 蕤呬耶經 897, and the Dhyanottarapatalakrama.
Charya Tantra: The main Charya Tantra is the Mahavairocanabhisambodhi Tantra (tathagata lineage), in Japanese it is called the 大日経 (dainichikyou).
Two others are the Vajrapani Initiation Tantra (Vajra lineage)and the Extensive Tantra of Hayagriva (lotus lineage).
Also the Arya Manjushri Root Tantra is a Charya Tantra text.
Yoga Tantra: The main Yoga Tantra text is called the Tattvasamgraha Tantra, or the whole text cycle is placed under the name Vajrasekhara.
In Japanese it is 金剛頂経 (kongoucyoukyou).
For a list of all the yoga tantra texts used in Japanese Buddhism click here (coming soon).
The list is divided into texts that Kukai utilized and others that should be studied for a complete study of the Yoga Tantra texts.
AnutaraYoga Tantra: This group of texts was never brought to Japan and practiced, although a few seem to be included in the Tripitaka, they are not practiced.
These tantras are practiced in Tibetan Buddhism and Newar Buddhism.
Some of the major texts are the Guhysamaja Tantra, the Kalachakra Tantra, the Chakrasamvara Tantra, and the Hevajra Tantra.
There are numerous texts and practices in the Highest Yoga Tantra category, but since my page is focused on Japanese Buddhism, I will not go into much detail here.