2015 — The Guesthouse
Agung Sambuko — Mr. Sam — grew up in Bondowoso, the town closest to Kawah Ijen. In 2015 he opened the Ijen Bondowoso Homestay on Jl. Khairil Anwar No.102 (the current office address is No.102A — the 'A' suffix reflects the current office numbering), the same address where JVTO operates today. Booking.com guests rated the property 9.4 / 10 — an award that was shipped to the Bondowoso address that year.
He was already an active officer in the Indonesian National Police, assigned to Ditpamobvit — the directorate responsible for security at vital tourist objects including the Ijen Crater area. Managing the guesthouse meant he saw both sides of East Java volcano tourism: the visitor experience and the operational safety gaps.
Legal Formalization — PT Java Volcano Rendezvous
The guesthouse era grew into PT Java Volcano Rendezvous, formalized with NIB 1102230032918 (TDUP issued 2023). Separately, Stefan Loose Reiseführer Indonesien: mit Reiseatlas (ISBN-13 9783770167654, p. 287) named "Agung" as the operator of the Ijen Bondowoso Homestay with tour arrangements — an independent German travel publisher, not a JVTO-authored reference, listing the same name at the same address. Publication year and edition are not asserted.
2023 — TDUP Formalization
The Tourism Business Permit (TDUP) was formalized in 2023, completing the regulatory paperwork chain. NIB 1102230032918 is the government-issued national business registration number, verifiable through Indonesia's OSS system.