Tanzaburo Tojima Wants To Be Kamen Rider is a Manga/Manhwa/Manhua in english language, SUGGESTIVE series, english chapters have been translated and you can read them here. You are reading chapters on www.mgeko.cc fastest updating comic site. The Summary is

Ever since he was born, Tanzaburo dreamed of becoming a Kamen Rider. Even as a 40 year old adult, he continued to dream about becoming one and he would train and exercise regularly. One day, "Shocker" appeared and attacked a convenience store to rob them. Springing to action, Tanzaburo put on a plastic Kamen Rider mask and faced the criminals. Instead of being seen as a hero, he was made into an internet laughing stock! Determined to end the fake Shocker's schemes by investigating, Tanzaburo takes to the streets as Kamen Rider!