Founded in 1982, Japan Asa Pharmaceutical Co., Ltd., which mainly produces professional insecticides and household hygiene and cleaning products, is the largest insecticide manufacturer in Japan, and in 2007 it accounted for 50% of the insecticide market share in Japan. Its mosquito coils occupy the second place in the Japanese market, second only to Golden Bird. As early as 1940, Ace Pharmaceutical released its first "Earth Anti-mosquito Roll Incense". In 2012, in response to the sluggish market of traditional mosquito coils, Ace Pharmaceutical launched a new type of mosquito coil with a special fragrance called "Earth Anti-mosquito Roll Incense Rose Fragrance" to win the hearts of young customers.
 
In 1990, Ace Pharmaceutical opened a production base in Tianjin, and its products are called "Ansu" in the Chinese market, but its mosquito coils are all produced in Southeast Asia. Due to its early entry into the Chinese market, Ansu's products are available in large supermarkets and e-commerce platforms. The price is also very friendly, 58 yuan for 30 plates, 78 yuan for 50 plates, and very cost-effective.
 
There are not many types of Ansu mosquito coils, and there are three main types of common ones on the market, namely durable, white sandalwood and floral. Like Jinniao, the active ingredient of Ansu mosquito coil is also allethrin synthesized from pyrethrum, and each plate contains 50mg of allethrin, the effect is good, and the impact on the human body is minimal.
 
White sandalwood type and floral type are mosquito incense, of which the floral fragrance type is lavender, white chrysanthemum, rose fragrance mixture, added natural plant essential oils, but also reduce smoke irritation, each fragrance type 10 plates, a purchase can enjoy three fragrances. These two types of packaging are 30 trays of barrels, beautifully packaged, easy to disassemble and not easy to break, easy to ignite, each plate can burn for 7 hours, basically meet the needs of one night protection.
 
The durable type is a non-carnied mosquito coil, the difference is that it is packaged in a large plate, which increases the care time from 7 hours to 12 hours in the previous two models, which is suitable for consumers who have long-term mosquito prevention needs.
 
Like the Golden Bird, Ansu mosquito coils are smoked mosquito coils, and the smoke produced when burning is slightly more than that of smokeless mosquito coils, which will have a certain impact on indoor air quality, if there are higher requirements for air quality, they should be used 2 hours in advance, or use other brands of smokeless mosquito coils or even electric mosquito coils.