Yes, The Cassiopeia is still used for tour excursion service from Tokyo. Tours are typically start a minimum of 100 000yen. See the below website (Japanese) for details and tours can be booked from the same website though keep in mind these tours tend to get booked up really quickly
https://www.club-t.com/spgroup/special/japan/cassiopeia/index.htm
and this tour site (thanks @fkraiem)
Credit:stackoverflow.com‘
4 Mar, 2024
5 Mar, 2024
5 Mar, 2024