This study will evaluate the efficacy, safety, tolerability and pharmacokinetics of JTE-162 administered once daily for 2 weeks in subjects with cryopyrin-associated periodic syndrome (CAPS)

Inclusion Criteria:

• Diagnosed with familial cold autoinflammatory syndrome (FCAS) or Muckle-Wells syndrome (MWS) confirmed by:
• Clinical History: At least 2 typical clinical symptoms (e.g., urticarial skin rash, myalgia, arthralgia, recurrent fever, fatigue/malaise, conjunctivitis or other autoinflammatory symptoms) prior to the Screening Visit; AND
• Genetic Confirmation: Confirmed nucleotide-binding and oligomerization domain (NOD)-like receptor family pyrin domain containing 3 (NLRP3) mutation;
• Willing to discontinue current anti-interleukin (IL)-1 treatment, if applicable;
• Demonstrates de novo flaring of CAPS during the Screening Period.

Exclusion Criteria:

• Has chronic infantile neurologic cutaneous articular syndrome (CINCA)/neonatal-onset multisystem inflammatory disease (NOMID);
• Has a history or presence of amyloidosis, progressive hearing loss, organ damage or any symptom contraindicating anti-IL-1 treatment washout;
• Has active systemic bacterial, fungal or viral infection(s) within 14 days prior to Day 1 or a history of clinically significant recurrent infectious diseases