These are companies that give away products as a gift. This only includes perks that are sent to you without any additional cost, and not companies that give discounts on their products.
Ai Robotics
Aichi Financial Group
Chuokeizai-Sha
Fuji Nihon Seito
Greenland Resort
Gunma Bank
Hagihara Industries
Happinet
Hokuhoku Financial Group
Iceco
Japan Craft
Japan Post Bank
Jason
Kirin
Komatsu
Maxvalu Tokai
Meito Sangyo
Mitsui O.S.K. Lines
Nac
Nojima
Pepper Food Service
PR Times
Sanrio
Sato Food Industries
Sekido
Shimadaya
Soracom
Takara Tomy
Techno Ryowa
Tone
Torigoe
Toppan
Toyota
United Supermarket
WA
Yuasa Funashoku
Yukiguni Factory