Kurobe Alphine route + Kurobe Gorge Railway

Konbawa/Konichiwa
For Alphine Routes
1) Is mid March to late March opened for visit ? What about year 2024 ?
2) The luggage delivery (takuhaibin) only provide between 15Apr to 31Oct every year ? What about 2024 ?
For Kurobe Gorge Railway between Unazuki & Keyaikidaira
3) It does not operate in late March ? When the operating period in 2024?
Thanks in advance for the info.
Arigatogozaimatsu.

You can buy 1 day unlimited rail pass for kurobe gorge railway for 4000 yen

The opening of the Kurobe Gorge is affected by the snowfall in the winter https://www.asahi.com/sp/ajw/articles/14876202

The entire length from Unazaki to Keyakidaira didn't get open until 6th May this year https://www.kurotetu.co.jp/en/timetable/