Parents' birthdays are a big deal for children. In addition to making arrangements, you should also prepare a small birthday gift as a surprise, which will make your parents happier and feel that you have grown up.
If you have a certain amount of savings, it is recommended to give your father a watch. Men of this age need very high-quality things to improve themselves. For dad's 40th birthday, you can also give some funny commemorative gifts. If you think it is too formal, give your father a real doll. The body can be made into the shape of Superman, and the head is made with dad's photo. The similarity is very high, and dad himself will like it very much.
Since dad doesn't like Japanese things, don't give similar objects, lest everyone is unhappy on a good birthday. You can go to some websites that specialize in customizing real dolls to customize a Q version cartoon male doll, or you can make it into a family portrait. There are other gifts. You can choose and see, which will be of great help to your choice.