How to write OI Tsukuba-shi Ibaraki in Japanese characters

How to write OI Tsukuba-shi Ibaraki in Japanese characters. The data come from Japan Post.

zipcode and address

OI（Inseart numbers and so on before the address）
Tsukuba-shi, Ibaraki
300-1243 Japan

Japanese Kanji

You can click/tap to copy Japanese Expression partially.
茨城県つくば市大井
3001243

Japanese Hiragana

いばらきけんつくばしおおい

Japanese Katakana

イバラキケンツクバシオオイ

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