にゃ

(colloquial contraction of には, marking a topic or contrast)

ɲ̟ a̠
particle Rare #29,316
(colloquial contraction of には, marking a topic or contrast) Common in casual speech; にゃ is a contraction of には.
JA: この町にゃ、いい店がたくさんあるよ。
EN: There are lots of good shops in this town.

おかあさん風邪だっていうんだから→次の土曜にゃ戻って来るよぉ。

Mom says she has a cold, so she'll be back next Saturday.

— となりのトトロ (1988)

誰も助けにゃ来ねえよ

Nobody's coming to help you.

— ロード・オブ・ザ・リング/二つの塔 (2002)

みんなの言う事にゃ——詩なんて味気ない

They all say poetry is dull.

— いまを生きる (1989)

あるとこにゃあるもんだな

Well, would you look at that—it really does exist.

— High and Low (1963)

ジャングルにいたころにゃあのキムにだって分かってたはずなのにな

Even Kim must have known that back when we were in the jungle.

— イノセンス (2004)

Sounds similar to