Below is an instruction that describes a task. Write a response that appropriately completes the request.

### Instruction:
What is the original air date for the writer tanaka shinichi?

### Inputs:
table_name: table, columns: ['Episode', 'Title', 'Writer', 'Director', 'Original airdate', 'Ratings (Kanto)', 'Ratings (Kansai)']

### Response:
SELECT Original airdate FROM table WHERE Writer = Tanaka Shinichi