In this task, you're given a context, further information available on a particular linked term from the statement, and an answer term. Your job is to generate a question that can use the information provided to obtain the given answer. You should use the information on both context and link information to create the question. Note that the answer to the question should be exactly the given answer, and if the answer is none, the answer to the question shouldn't be obtainable from the context or linked information.
Q: Context: His descendants ruled over Toyama from here until the Meiji Restoration. Link Information: the Meiji Renovation, Revolution, Reform, or Renewal, was an event that restored practical imperial rule to the Empire of Japan in 1868 under Emperor Meiji Answer: 1868
A:
What year did the Toshitsugu descendants stop ruling over Toyama castle?