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※The rates below are effective for reservations made on or after Sunday, July 1, 2018. Please check this page for rates for reservations made before Saturday, June 30, 2018.

Floor Layout


The spacious Iwasaki Koyata Memorial Hall with views of the garden can be used for conferences, lectures, concerts and other large functions.

Location East Wing B1F
Size (sq.m) 195 m²

Capacity and Rates (for conference) (for room use after August 1, 2018)

Capacity For conferences (classroom style) 120
For conferences (theater style) 180
For conferences (hollow square) 60
Rates For conference (2 hours) Regular Rate: 178,200 yen
Discount Rate*: 142,560 yen
For conferences (half day) Regular Rate: 297,000 yen
Discount Rate*: 237,600 yen
For conferences (full day) Regular Rate: 594,000 yen
Discount Rate*: 475,200 yen

Capacity and Rates (for banquets) (for room use after August 1, 2018)

Capacity For banquets (circle table style) 100
For banquets (buffet style) 150
Rates For banquets (2 hours) Regular Rate: 75,600 yen
Discount Rate*: 56,700 yen
For banquets (for 1 additional hour) Regular Rate: 37,800 yen
Discount Rate*: 28,350 yen

Capacity and Rates (for exhibitions) (for room use after August 1, 2018)

Rates For exhibitions Regular Rate: 712,800 yen
Discount Rate*: 570,240 yen
For exhibitions
(off-peak season: Jan, Feb, Aug)
Regular Rate: 534,600 yen
Discount Rate*: 427,680 yen

*Discount rates are applicable for IHJ members and those whose use of facilities meets the criteria of the public interest purposes of the I-House. Please contact the I-House for further information.
*The prices include consumption tax (as of April 1, 2014).
*The above-mentioned prices are subject to a 10% service charge.

Floor Plan

Click the image to view as PDF. Plan-View

Inquiries and Reservations

Banquet Reservations
International House of Japan
TEL: 03-3470-4616 (10:00 am-7:00 pm)
FAX: 03-3470-3210