Data entry - C# Datatable - Japanese characters

NOTE: Your computer should be able to read Japanese characters.
You can see if your computer supports this by opening the file and confirming that you can see various japanese characters listed.
If you only see a lot of square character, you may need to install the Japanese language pack through Windows Update.

I'm creating what I call a Japanese character converter. It's essentially a tool that should be able to get a string of japanese characters, and convert them to english or other japanese characters.

Anyways, as you can see in the attached file, you may notice the list I already have contains a few rows:
- Romaji (english characters)
- Hiragana (Japanese)
- Katakana (other Japanese)
- Kanji (more advanced Japanese)


But the problem is that the Kanji rows are all empty, and I'd like someone to enter the correct Kanji in the currently existing rows, and adding any new rows for every other character which isn't listed yet.
You can do this by simply adding a new line that looks like this:
CharacterTable.Rows.Add("i", "い", "イ", "");
Should also have correct Romaji, Hiragana and Hiragana characters.

First character "i", is Romaji.
First character "い", is Hiragana.
First character "イ", is Hiragana.
First character "", should be Kanji but it's blank because there either is no Kanji for this character, or the Kanji character should be added. Which is what I would like you to do.

I hope the job description explained this well.
If you have any additional questions, feel free to ask.