ありがたや

Meanings

what a blessing; how fortunate; thank goodness

usually written using kana alone

An exclamation of gratitude or relief, often with a slightly old-fashioned or literary feel. Used when something fortunate happens or a difficulty is avoided.

ありがたや、無ぶ事じに帰かえってこれた。
Thank goodness, I made it back safely.
ありがたや、雨あめが上あがった。
How fortunate, the rain has stopped.