The Japanese phrase for "never give up" is "諦めるな" (akirameru na). It's a powerful phrase that represents perseverance, determination, and resilience. However, again, before getting a tattoo in a language that you're not familiar with, it's important to properly research and verify the accuracy and meaning of the phrase. Additionally, you may want to consider consulting a professional Japanese calligrapher or tattoo artist who has experience with writing Japanese characters to ensure that the tattoo is written correctly and looks aesthetically pleasing.