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
Fullcast
Greenland Resort
Gunma Bank
Gunze
Hagihara Industries
Happinet
Hokuhoku Financial Group
Iceco
Iwatsuka Confectionery
Japan Craft
Japan Post Bank
Jason
Jellybeans Group
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
Wel-Dish
Yuasa Funashoku
Yukiguni Factory