Sure! Here are the rewritten sentences that maintain the same meaning as the originals:

1. **This is my first visit to Japan.**
*This is the first time I've been to Japan.*

2. **How long have Helen and Robert been married?**
*How long has it been since Helen and Robert got married?*

3. **I haven't been to an Indian restaurant for 2 years.**
*I haven't visited an Indian restaurant since 2 years ago.*

4. **John failed to complete the job on time.**
*John did not succeed in completing the job on time.*

5. **Laura is too young to vote in the election.**
*Laura is not old enough to vote in the election.*