Room & Equipment Rates / Capacity
The prices include consumption tax and 15% service charge.
Banquet Room Rates
JPY (tax and service charge inclusive)
| Upper row: Regular price Lower row: Special price |
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| For conferences | For banquets | For exhibitions | |||||||
|---|---|---|---|---|---|---|---|---|---|
| 2 hours | half day (6 hours between 9:00-16:00) |
full day 9:00-21:00 |
1 additional hour | 2 hours | 1 additional hour | Regular | Off-peak Jan., Feb., Aug. |
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| Iwasaki Koyata Memorial Hall 195m² |
271,975 217,580 |
474,375 379,500 |
948,750 759,000 |
139,150 111,320 |
113,850 85,387 |
56,925 42,693 |
1,214,400 971,520 |
910,800 728,640 |
|
| Kabayama -Matsumoto Room (All Rooms) 247m² |
271,975 217,580 |
521,812 417,450 |
1,043,625 834,900 |
139,150 111,320 |
107,525 80,643 |
53,762 40,321 |
1,366,200 1,092,960 |
1,024,650 819,720 |
|
| Kabayama -Matsumoto Room + Room 2 + Room 3 198m² |
208,725 166,980 |
417,450 333,960 |
834,900 667,920 |
113,850 91,080 |
86,020 64,515 |
43,010 32,257 |
1,214,400 971,520 |
910,800 728,640 |
|
| Kabayama -Matsumoto Room + Room 2 / Room 2 + 3 + 4 147m² |
158,125 126,500 |
316,250 253,000 |
632,500 506,000 |
88,550 70,840 |
69,575 52,181 |
34,787 26,090 |
910,800 728,640 |
683,100 546,480 |
|
| Kabayama -Matsumoto Room / Room 2 + 3 / Room 3 + 4 98m² |
107,525 86,020 |
208,725 166,980 |
417,450 333,960 |
56,925 45,540 |
44,275 33,206 |
22,137 16,603 |
607,200 485,760 |
455,400 364,320 |
|
| Room 2 / 3 / 4 51m² |
53,130 42,504 |
104,362 83,490 |
208,725 166,980 |
27,830 22,264 |
26,565 19,923 |
13,282 9,961 |
303,600 242,880 |
227,700 182,160 |
|
| Waiting Room 11.87m² |
6,957 5,566 |
20,872 16,698 |
41,745 33,396 |
– – |
– – |
– – |
– – |
– – |
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| The prices include consumption tax and a 15% service charge. *Special price (lower row) is for 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. |
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(As of September 1, 2025)
Banquet Room Capacity
(capacity: persons)
| Banquet Room | Size (sq.m) |
Hollow- square |
Class- room |
Theater | Round- table |
Oval- table |
Cocktail Buffet |
Sit-down Buffet |
|---|---|---|---|---|---|---|---|---|
| Iwasaki Koyata Memorial Hall |
195m² | 60 | 120 | 180 | 100 | – | 150 | 80 |
| Kabayama-Matsumoto Room + Room 2 + 3 + 4 |
247m² | 90 | 120 | 180 | 110 | – | 150 | 80 |
| Kabayama-Matsumoto Room + Room 2 + 3 |
198m² | 65 | 100 | 160 | 90 | – | 120 | 70 |
| Kabayama-Matsumoto Room + Room 2 / Room 2 + 3 + 4 |
147m² | 45 | 75 | 120 | 70 | 30 | 90 | 60 |
| Kabayama-Matsumoto Room / Room 2 + 3 / Room 3 + 4 |
98m² | 35 | 50 | 80 | 50 | 22 | 60 | 40 |
| Room 2 / 3 / 4 |
51m² | 24 | 24 | 40 | 20 | 18 | 30 | – |
Lecture Hall Room Rates & Capacity
JPY (tax and service charge inclusive)
| Upper row: Regular price Lower row: Special price |
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| Style | Capacity | Size (sq.m) |
9am-12 13-17pm 18-21pm |
full day | 1 additional hour |
Hollow- square |
Class- room |
Theatre | |
|---|---|---|---|---|---|---|---|---|---|
| Lecture Hall Annex 2F |
145m² | 101,200 80,960 |
271,975 217,580 |
34,787 27,830 |
48 | 80 | 120 | ||
| The prices include consumption tax and a 15% service charge. *Special price (lower row) is for 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. Audio equipment, rental projectors, screens and whiteboards, as well as soft drinks and Bento-boxes are available. Alcoholic beverages are not available. |
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(As of September 1, 2025)
Seminar Room Rates & Capacity
JPY (tax inclusive)
| Upper row: Regular price Lower row: Special price |
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| Style | Capacity | Size (sq.m) |
9am-12 13-17pm 18-21pm |
full day | 1 hour |
Hollow- square |
Class- room |
Theatre | |
|---|---|---|---|---|---|---|---|---|---|
| Seminar D Annex 1F |
Hollow- square |
for 24 | 53m² | 29,700 23,760 |
78,100 62,480 |
12,100 9,680 |
24 | 24 | — |
| Seminar E Annex 1F |
Hollow- square |
for 12 | 26m² | 15,400 12,320 |
40,700 32,560 |
6,050 4,840 |
12 | — | — |
| 401 West Wing 4F |
Hollow- square |
for 16 | 28.4m² | 17,600 14,080 |
47,300 37,840 |
7,260 5,808 |
16 | — | — |
| 402 West Wing 4F |
Oval- table |
for 12 | 19.9m² | 12,100 9,680 |
34,100 27,280 |
4,840 3,872 |
12 (Oval-table style only) | ||
| 403 West Wing 4F |
Hollow- square |
for 16 | 28.6m² | 17,600 14,080 |
47,300 37,840 |
7,260 5,808 |
16 | — | — |
| 404 West Wing 4F |
Hollow- square |
for 24 | 44.0m² | 27,500 22,000 |
71,500 57,200 |
10,890 8,712 |
24 | 30 | — |
| 403･404 West Wing 4F |
Hollow- square |
for 34 | 72.6m² | 44,000 35,200 |
118,800 95,040 |
— | 34 | 42 | — |
| The prices include consumption tax. *Special price (lower row) is for 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. Rental projectors, screens and whiteboards, as well as soft drinks and Bento-boxes are available.. Audio equipment and alcoholic beverages are not available. Request for a change in room layout is subject to an additional 20% charge. |
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(As of September 1, 2025)
Equipment
JPY (tax inclusive)
| Wired Internet access (Wi-fi available for free in all venues) | 2,200 yen |
| Audio cable | 1,100 yen |
| One microphone | 2,200 yen |
| Additional microphones (2-8) | 1,100 yen each |
| Stage for East Wing venues (1,200 x 2,400 x 200H or 400H) |
3,300 yen |
| Stage for Annex Lecture Hall (1,200 x 2,400 x 200H) |
3,300 yen |
| Whiteboard | 1,100 yen |
| Grand piano “Yamaha” (tuning fee not included) | 33,000 yen |
| Grand piano “Steinway & Sons” (tuning fee included) | 66,000 yen |
| Electone (EL-100) | 11,000 yen |
| Music stand | 550 yen |
| LCD monitor (55-inch, with movable monitor stand) | 22,000 yen |
| Permanent projector (12,000 lumens) and screen (4,428×2,491mm) for Iwasaki Koyata Memorial Hall (Lower row: Special price) |
55,000 yen 38,500 yen |
| Permanent projector (8,000 lumens) and screen (2,657×1,494mm) for Kabayama-Matsumoto Room and Room 4 (Lower row: Special price) |
20,900 yen 15,400 yen |
| Permanent projection screen for Kabayama-Matsumoto Room and Room 4 (2,657×1,494mm) | 4,400 yen |
| Permanent projection screen for Lecture Hall (2,000×2,000mm) | 2,200 yen |
| Free-standing projection screen (100 inches) | 2,200 yen |
| Mobile projector | 5,500 yen |
| Simultaneous interpretation booth for Iwasaki Koyata Memorial Hall and Lecture Hall | 33,000 yen |
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We can also provide simultaneous interpretation, flowers, hanging signs, photographs, etc. Please contact the Banquet Desk for further information. *Some of the equipment cannot be used in certain venues. *There is no audio equipment available in the seminar rooms. |
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(As of September 1, 2025)
Reservations and Inquiries
Banquet Reservations
International House of Japan
TEL: 03-3470-4616 (10:00-18:00, Closed on Sundays & Holidays)
FAX: 03-3470-3210