Are there any Eastern arts that utilize a shield with a sword or a spear?
Okinawan kobudo (weapons training) has a short-spear and shield combination called the tinbe (shield) and rochin (shortspear). Purportedly, the shield was made of a tortoise shell, which is now illegal, causing modern versions to be made from plastic.
The tradition of Okinawan weapons is often associated with Okinawan and Japanese karate but it is also studied independently in traditions such as that of Shinken Taira (pictured below). Tinbe/rochin practice is less common among karateke than practice of sai, bo, and so on.
Krabi Krabong the tradtional weapons art from Thailand has a panoply of arms, including different shields.
The shields are usually combined with offensive weapons. During a fight/show the participants often switch weapons/shields or pick up weapons others dropped. Thus many combinations are possible.
Shields were used historically in Chinese martial arts, made of woven stems such as rattan, or wood covered in leather, in various sizes and designs.
In Shaolin Kung-Fu, a round rattan shield (Tengpai) is sometimes used with the single-edged sword (dao).
Ancient Chinese Weapons: A Martial Artist's Guide, Dr Yang, Jwing-Ming, 1999 - this has an entire chapter on shields and armour
- Introduction to Shaolin Kung Fu, Wong Kiew Kit, 1981 - this contains a picture of the author with the "single knife"/"waist knife" (ox-tail dao) and rattan shield
- Shaolin Kung Fu Sword and Shield Group SKFG - YouTube video
- A Social and Visual History of the Hudiedao (Butterfly Sword) in the Southern Chinese Martial Arts has some photos of shields used by a rural militia in the Second Opium War (1856-1860), for example: