From RGB to CMYK! Color mode conversion method
How to change color modes using Photoshop
Here, we will use Photoshop to convert to CMYK.

Select "Mode" from "Image" and if the color is set to "RGB Color", change it to "CMYK Color".
However, if you convert in this way, changing from RGB to CMYK will result in some areas that cannot be reproduced and will appear dull .
I want to print RGB data, but I don't want to change the color as much as possible... and retouching is a pain!
RGB printing is the solution to this problem.
→ Explaining RGB printing! The difference from CMYK printing and why we recommend it
PHOTOPRI for RGB printing
Our service, "PHOTOPRI," aims to provide high-quality printing that is used by solo artists and professionals in various industries, and supports printing in the wide color gamuts of RGB and Adobe RGB.
With RGB printing, you can print the original RGB image without converting it to CMYK, saving you the trouble of conversion and ensuring that the colors don't become dull.
There is also a trial print available, so if you would like to try RGB printing but cannot do it at home, please give it a try.