Certainly! Here's an example of how you can use a regular expression (regex) to validate if a given input string contains exclusively Japanese Kana characters:

```typescript
const input = "ひらがなカタカナ"; // Example input string

// Regular expression pattern for Japanese Kana
const kanaPattern = /^[\u3040-\u309F\u30A0-\u30FFー]+$/;

// Validate if the input string contains exclusively Japanese Kana
const isValidKana = kanaPattern.test(input);

console.log(isValidKana); // Output: true
```

In this example, we use the regex pattern `/^[\u3040-\u309F\u30A0-\u30FFー]+$/` to match the input string against Japanese Kana characters. Here's a breakdown of the regex pattern:

- `^` asserts the start of the string.
- `[\u3040-\u309F\u30A0-\u30FFー]` defines a character class that matches any character within the Unicode ranges of Hiragana (`\u3040-\u309F`), Katakana (`\u30A0-\u30FF`), and the long vowel dash (`ー`).
- `+` indicates that the character class should appear one or more times.
- `$` asserts the end of the string.

By using the `test()` method of the regex object, we check if the input string matches the regex pattern. If the input contains exclusively Japanese Kana characters, the `test()` method will return `true`, indicating that the input is valid.
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