- Italy--Venice2
- Iẓhār al-asrār (Birgivî Mehmet Efendi)2
- Japan2
- Jewish calendar2
- Jewish martyrs2
- Jewish philosophy2
- Joseph (Son of Jacob)2
- Judaism--Customs and practices2
- Judaism--Liturgy2
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. Ḥāshiyah ʻalá Sharḥ Ḥikmat al-ʻayn2
- Jurjānī, ʻAlī ibn Muḥammad, al-Sayyid al-Sharīf, 1340-1413. ḥāshiyah ʻalá Sharḥ Mukhtaṣar al-Muntahá2
- Jāmiʻ al-ṣaghīr (Suyūṭī)2
- Jāmiʻ al-ṣaḥīḥ (Bukhārī, Muḥammad ibn Ismāʻīl)2
- Jārbardī, Fakhr al-Dīn Aḥmad ibn al-ḥasan, d. 1345. Mughnī fī ʻilm al-naḥw2
- Kaddish2
- Karaite law2
- Kashshāf (Zamakhsharī, Maḥmūd ibn ʻUmar)2
- Ketubah2
- Manuscripts, German2
- Manuscripts, Japanese2