Tenga (Japanese: テンガ) is a Japanese brand of male masturbation aids by the company of the same name. Masturbation aids (masturbators), personal lubricants, and other related products are sold under this brand. The company's masturbators have been noted for their design aesthetics unexpected for a sex toy, and have received multiple industrial design awards.

Tenga Inc. (有限会社 典雅, Yūgen Gaisha Tenga) was established on March 25, 2005. The Tokyo-based company is headed by Koichi Matsumoto (松本光一), who used to be an auto mechanic. The first line of products (Tenga Cups) were released on July 7, 2005. Following the implementation of Companies Act in 2006, the company changed its type to kabushiki gaisha and continues its operation as Tenga Co., Ltd. (株式会社 典雅, Kabushiki Gaisha Tenga).

The word "tenga" (典雅) is a classical Japanese adjectival noun meaning "righteously arranged and elegant", typically used to praise the beauty of a kimono or buyō (Japanese dance). This name was chosen to counter the public image of adult goods, and with an aim to create high-quality products with new ideas.

As of 2011^[update], 28 employees work in the company (including the board of directors), with 8 of them female. One of the directors is Masanobu Sato (佐藤雅信), who is responsible for the company's Overseas Business Department. Sato is a Masturbate-a-thon champion who achieved a world record for the "longest time spent masturbating/male" in 2008 (9 hours 33 minutes). In 2009, he extended his own record to 9 hours 58 minutes. He has been participating in the competitions using a set of Tenga masturbators of his own.

Tenga offers several product categories. Disposable "Cup" series which are intended for one-time use only (which can be reused if washed correctly), "Flip" series that split open to be easily washable and reusable, compact "Egg" series which resemble Easter eggs and stretch when in use, and "Tenga 3D" series which are intended to be reversed when not in use, showing its geometric patterns. Other accessories include lotions (lubricants), electrical "Tenga Warmers", and "Hole Warmers" (a stick-shaped hand warmer that uses supersaturated sodium acetate).

Tenga does not design their products as a replacement of human vagina. Erotic or sexual imagery are deliberately avoided in the product design and advertising. The products and their packaging are designed by a consumer goods stylist retained by Matsumoto. They typically feature solid colors of red, white, black, or gray, and have been described as "stylish" and as "Apple of the sex toy industry." The design reduces embarrassment for potential customers. One of their product "Rolling Head Cup" exemplifies the disconnection of the stimulatory function from appearance or simulation of ordinary sexual activity. The bellows in the middle allows for the top of the product to be swiveled around in a movement that is not analogous to sexual intercourse.

Due to its functionality, the product "Tenga Cup" is the most recommended product among 30 masturbation cups. Tenga Cups are equipped with a valve to control the internal pressure of the unit when inserted. A vacuum-like atmosphere can be created, which creates suction on the penis.

The interiors of Cups, Eggs and Flips are fabricated using elastomer; with the 3Ds using an Ag antibacterial form of that material.