Exclusive use · executive meetings · special gatherings
SEI-IKI | Private Retreat
A place of stillness, privacy and purpose.
A quiet place for conversations that matter.
Important decisions need an environment made for thinking
Depth of thought. Quiet. Space. Distance from the outside world.
EXCLUSIVE USE
One Island, One Castle All 14 rooms, for just one group
Exclusive use from ¥1,000,000
For families, important guests and executive groups: Horizon Castle’s signature private stay, with the place and the time entirely yours.
EXECUTIVE RETREAT
An environment that changes the quality of decision-making itself
ISOLATION | Removed from the outside world, thought deepens in quiet. CONTINUITY | Thought remains uninterrupted, free from the pressure of time. DEPTH | Dialogue deepens and moves toward what truly matters.
MEETING ROOM
A dedicated room for conversations that matter
Horizon Castle has a dedicated meeting room for meetings and small-group dialogue. From daytime sessions to conversations over dinner and multi-day executive retreats, work and stay can unfold in one continuous setting.
PURPOSE
Time and space, shaped around your purpose
Meetings, shared experiences for a team, gatherings with the people who matter. Tell us your group size and wishes, and we will propose a combination of meeting room, dining, rooms and cultural experiences. Please enquire about reunions, training retreats, employee-benefit stays and client hospitality, including exclusive use of Horizon Castle.
MEETINGS · RETREATS
Executive Meetings & Retreats
Overlooking the sea, conversations unfold with clarity and purpose. From focused discussions to dinner and a morning walk, time together invites fresh perspectives and lasting connections.
What we can arrange · Meetings in the dedicated meeting room · Dinner and conversation at a table facing the sea · Overnight executive retreats, including exclusive use · A morning walk or a cultural experience the next day Group size, dates, equipment and layout are confirmed individually.
TEAMS · CULTURE
Cultural Team Retreats
Create a garden, experience taiko, and exchange perspectives through art. Shared activities, quiet discoveries, and thoughtful conversation bring teams closer through Japanese culture and nature.
Elements to combine · Team-building programmes · Garden-making · Taiko drumming · Conversation in front of the art in the building · Experiences in the local area Content, instructors and dates are planned individually for your group (advance booking).
PRIVATE · BESPOKE
Bespoke Private Gatherings
Mark a family occasion, reunite with friends, or welcome cherished guests. Seasonal cuisine from Saikai and carefully arranged cultural experiences shape a gathering uniquely your own.
What we can arrange · Dinner at a table facing the sea · Tea, incense, flowers and other cultural experiences (some need advance booking) · A stay with exclusive use of the castle Dishes change with the season and the catch. Group size and content are confirmed individually.
HOSPITALITY
Private hospitality, at a quieter pace
For welcoming important guests: Saikai ingredients, a table overlooking the sea, and time for conversation without hurry.
FOR TRAVEL PARTNERS
For travel companies and partners
From a single special night to exclusive use, executive retreats, cultural team programmes and journeys across Kyushu, we combine rooms, dining and cultural experiences into stays shaped around your clients’ purpose. Site inspections and joint product development are welcome.
Bespoke FIT
Couples, mothers and daughters, friends: length of stay and pace designed freely.
Small Group
Small-group stays themed on the island’s nature, art, Japanese culture and food, savoured at an unhurried pace.
Full Buyout
Exclusive use of all 14 rooms, for families, friends and VIP guests.
Executive Retreat
Executive retreats, client hospitality, brand events and team retreats.
Kyushu Premium Circuit
Kyushu itineraries combined with Fukuoka, Nagasaki and Sasebo.
Special Cultural Dates
Limited dates built around cultural programmes once their content and dates are confirmed.
*Sales conditions, rates, commission and contracts are provided in individual discussions. Experiences, transfers and special programmes are offered once their conditions are confirmed.
Terms of use are provided individually.
Part of the freedom of exclusive use is that different guests can spend the day in different ways.
LANGUAGE SUPPORT
Language Support
Professional interpretation can be arranged in advance for international guests.
Fees are quoted separately according to language, duration, subject matter and interpreter availability. Interpretation can also be discussed for cultural experiences, local visits, company visits and meetings.