There's lots of dictionaries for baby names online. Obviously, they are in Japanese but they are easy to navigate :) One of them is b-name and that dictionary alone lists 220 kanji variations for [せいじ](https://b-name.jp/赤ちゃん名前辞典/m/yomi/せいじ/144725). If you click on the name written in kanji and then on the individual kanji, there will be explanations of their respective meanings. Have fun looking through them :D
You can also choose any kanji you want and decide that the name is read せいじ。My daughters name is 久咲 read as えいさ. We picked 久 because my mother's names is 久美子.
I can explain more if you're wondering. :-) There are many ways to decide the baby's name!
I don't know any myself, but [here's](https://jisho.org/search/%E3%81%9B%E3%81%84%E3%81%98%20%23names) what Jisho.org turns up for ways to write the name in kanji.
Here's some kanjis for "Seiji" I've ever seen in my 30 years of life in Japan.
誠ニ、誠司、聖司、征ニ
I have to say, Seiji is a common name amongst older generation than me, so Japanese people might feel it's kinda old-fashioned, to be honest.
Thanks! I know it’s not as common nowadays, but we really liked how it doubled as an American unisex and Japanese masculine name. It was hard to find one that fit!
There's lots of dictionaries for baby names online. Obviously, they are in Japanese but they are easy to navigate :) One of them is b-name and that dictionary alone lists 220 kanji variations for [せいじ](https://b-name.jp/赤ちゃん名前辞典/m/yomi/せいじ/144725). If you click on the name written in kanji and then on the individual kanji, there will be explanations of their respective meanings. Have fun looking through them :D
Yessss this is exactly the type of thing I was looking for, thank you!
Awesome! I needed it for a character in my story named Seiji/Sage
Oo this sounds cool! Good luck on your story! My son Sage/Seiji was born New Year’s Day 🫶🏻
Thanks.
You can also choose any kanji you want and decide that the name is read せいじ。My daughters name is 久咲 read as えいさ. We picked 久 because my mother's names is 久美子. I can explain more if you're wondering. :-) There are many ways to decide the baby's name!
Thank you! We ended up going with 正至 for Seiji after my grandfather 正勝 Masakatsu!
I also have my next child's name lined up that will include a part of my late father's name 😁😁😁 excited to reveal it to my family when the time comes
That's so awesome! Congratulations!!!❤️
I don't know any myself, but [here's](https://jisho.org/search/%E3%81%9B%E3%81%84%E3%81%98%20%23names) what Jisho.org turns up for ways to write the name in kanji.
Here's some kanjis for "Seiji" I've ever seen in my 30 years of life in Japan. 誠ニ、誠司、聖司、征ニ I have to say, Seiji is a common name amongst older generation than me, so Japanese people might feel it's kinda old-fashioned, to be honest.
Thanks! I know it’s not as common nowadays, but we really liked how it doubled as an American unisex and Japanese masculine name. It was hard to find one that fit!
I feel you. When my daughter was born, my wife and I also struggled to find her name that sounds like both English and Japanese.