Professional baseball in Japan is run by a single body, Nippon Professional Baseball, and a spectator’s relationship with it is contractual. Buying a ticket forms an agreement of 17 articles, and among the things that agreement regulates is whether you may bring a trumpet.
Twelve clubs are split six and six between two leagues
The organisation fields twelve clubs. The Central League standings table lists six: the Yomiuri Giants, the Hanshin Tigers, the Hiroshima Toyo Carp, the Chunichi Dragons, the Tokyo Yakult Swallows and the Yokohama DeNA BayStars. The Pacific League table lists the other six: the Fukuoka SoftBank Hawks, the Hokkaido Nippon-Ham Fighters, the Chiba Lotte Marines, the Saitama Seibu Lions, the Tohoku Rakuten Golden Eagles and the ORIX Buffaloes.
Each club has one designated home stadium, and the organisation publishes the pairing as a franchise table with twelve rows. Below the twelve sits a second tier with its own calendar, schedules, standings and statistics, which the organisation’s English site calls the Farm Leagues.
The 2026 calendar runs from 21 February to 1 November
The English schedule panel on the organisation’s site sets out the season in stages, and the dates are specific.
| Stage | 2026 dates as published |
|---|---|
| Pre-season games | 21 February to 22 March |
| Regular season opening day, both leagues | 27 March |
| Interleague play | 26 May to 14 June |
| All-Star Game, first | 28 July, Tokyo Dome |
| All-Star Game, second | 29 July, Toyama |
| Climax Series | no line on the page |
| Nippon Series | 24 October to 1 November |
Two details in that panel are easy to miss. Both leagues open on the same day, 27 March, rather than staggering. And the panel carried no Climax Series line at all when the page was read on 29 September 2026, while the Nippon Series below it already carried seven dated games.
Those seven Nippon Series dates are 24, 25, 27, 28, 29 and 31 October and 1 November. Reading the gaps ourselves, the schedule leaves 26 and 30 October clear, so a series that runs to its full length has two days off inside it.
Buying a ticket forms a contract of 17 articles
The spectator terms are a published document in seven chapters and 17 articles. Article 2 states when the contract forms: it forms when a person intending to watch acquires a regular ticket. From that point the holder may enter at the time and place printed on the ticket, must present it at the gate, and must keep the stub and show it on request at any time until leaving.
The document has been in force since 4 February 2010, and the organisation’s regulations listing dates the version now published as in force from 1 February 2025. An English version of the same document is published in that listing. Article 15 fixes the forum for disputes: the district or summary court for the location of the organiser’s head office, as the exclusive court of first instance.
Nationality and age appear nowhere in that contract
Whether a visitor from abroad may buy a ticket and attend is a question the document answers by omission. Searching the whole 17 article text for the words for nationality, foreigner, passport, age and minor returns nothing at all.
What the document does control is who may not buy. Article 3 lists nine grounds for refusing to sell a ticket, and they are about conduct and affiliation rather than identity: membership of an organised crime group or a similar body, a period of five years since leaving one, organisational or business ties to one, providing funds or benefits to one, buying tickets in order to breach the resale rule, a sentence of a fine or heavier connected with conduct at a stadium or with organised cheering activity, where five years have not passed since the judgment became final, exceeding the per person purchase limit the organiser sets, designation under Article 11, and a catch all for other reasonable grounds.
Six categories of item are stopped at the gate
Article 5 bans six categories of item from the stadium unless the organiser permits them. Firearms and blades, fireworks, firecrackers, strong chemicals and other dangerous goods. Anything giving off a strong smell, making a noise that obstructs watching, or otherwise liable to obstruct other spectators. Bottles, cans, ice boxes and similar containers. Pets and other animals, with guide dogs, hearing dogs and the like excepted. Items whose purpose is excessive seat securing. And anything else the organiser or the stadium manager designates separately.
The same article gives the enforcement power in one sentence: to make the ban effective, the organiser may ask a spectator to open bags and show the contents, and may carry out a baggage inspection at entry.
That third category sits oddly beside a separate document. The organisation’s heat illness guideline, dated 2 July 2026, tells home clubs to recommend that spectators bring drinking water with them. Article 5 bans bottles and cans unless the organiser permits them. The two live in different documents, and neither one explains the other.
Trumpets, drums and banners need a permit, and the permit goes to a group
Article 9 bars four kinds of cheering without permission: cheering using a trumpet, a drum, a bell, a whistle or any similar instrument; cheering using flags, banners or other objects liable to obstruct other spectators; cheering by a group that organises spectators or leads their support; and any other method the organisation designates.
Permission is not given to individuals. A separate set of rules in 12 articles governs applications, and only a group can apply. The application form carries nine items, and the fifth is a list of the members’ names, addresses and contact details. The group must also file a written undertaking that no member falls under the Article 3 grounds, that the rules will be observed, that no member simultaneously supports more than one club, and that each member will act as a model cheering leader for ordinary spectators.
Twelve grounds bar a group from permission under the ordinary route, one of them reaching to any member who has ever been ejected from a game, whether the organisation hosted it or not. A separate clause lets the organisation permit such a group anyway, weighing when the ground arose and all the circumstances. Permission is granted for a specified period within a single championship season, so it lapses and must be renewed. The organisation states that these decisions rest on its free discretion, that nobody has a right to permission, that no reasons will be given, and that no objection may be raised. Where a group is approved, the organisation may set aside a particular seating area for it and then allow the instruments, the banners and the designated methods inside that area.
Resale is banned except between people who already know each other
Article 4 is short and absolute at the front: nobody may resell a ticket to a third party, including through an internet auction, or otherwise let a third party acquire it, without the organiser’s permission. The proviso that follows is narrow. It covers transfers based on a specific relationship such as family, friends or business contacts, and only where the transfer is not for profit and not carried out as a business.
The purchase limit sits in Article 3 rather than Article 4. Acquiring more than the per person limit the organiser sets, whether directly or through a third party, is a ground for refusing to sell, and where the buyer is a group the limit is applied to every member of it.
A foul ball is the spectator’s risk, and an ejection is not refunded
Article 13 allocates the risk of being hit. The organiser and the stadium manager are not liable for damage arising from a home run ball, a foul ball, or any other consequence of the game, of fan service or of practice, unless the cause is attributable to them or their staff. Where it is attributable, the damages are limited to direct loss such as treatment costs, excluding lost profit and other indirect or special damage, unless the act was intentional or grossly negligent. The same article puts a duty on the spectator: to keep watching where balls are going, throughout practice and play, and to take enough care not to be injured.
The money rules are equally blunt. Article 12 provides that where entry is refused under Article 6 or a spectator is ejected under Article 10, the admission fee is not refunded, and that a ticket which is not a regular ticket is never refunded whatever the reason. Article 6 lists eight grounds for refusing entry, one of which is being noticeably intoxicated. Article 10 lists seven grounds for ejection, with a single softening clause: if the spectator promptly removes the cause and the nuisance to others is judged slight, the organiser may hold the ejection over. Article 8, the list that one of those seven ejection grounds points back to, runs to 17 prohibited acts.
Twenty-eight on the heat index starts a fixed list of measures
The heat illness guideline issued by the organisation’s medical committee on 2 July 2026 runs in four sections: basic knowledge, then separate guidance for players and club staff, for umpires, and for spectators. The trigger is the same in all three: the home club measures the wet bulb globe temperature on the ground, and at 28 degrees or above the listed measures apply.
For spectators the list is concrete. A first aid room with air conditioning. Somewhere to buy a drink, water points, and a place to rest with air conditioning or mist showers, with signage pointing to them. A recommendation that spectators bring drinking water. More entry and exit gates, so that queueing time in direct sun falls, and shade over the queues at concession stands. Staff and a first aid team circulating to spot people in trouble early. After the gates open, repeated announcements before the game and between innings on the big screen and over the public address system about the risk and about drinking, including the point that alcohol increases urine output and does not count as rehydration.
Two sentences in the document sit oddly together. Whether a game is played at all is left to the home club, not to the guideline. And the guideline closes its spectator section by saying that even with every measure above in place, the risk of heat illness does not fall to zero.
Sources Checked
Nippon Professional Baseball — Central League and Pacific League club pages
Confirmed that the Central League standings table lists six clubs, the Yomiuri Giants, Hanshin Tigers, Hiroshima Toyo Carp, Chunichi Dragons, Tokyo Yakult Swallows and Yokohama DeNA BayStars, and that the Pacific League table lists the other six, the Fukuoka SoftBank Hawks, Hokkaido Nippon-Ham Fighters, Chiba Lotte Marines, Saitama Seibu Lions, Tohoku Rakuten Golden Eagles and ORIX Buffaloes.
https://npb.jp/cl/
https://npb.jp/pl/
Nippon Professional Baseball — franchise stadium table
Confirmed that each of the twelve clubs is paired with one home stadium in a table of twelve rows.
https://npb.jp/stadium/franchise.html
Nippon Professional Baseball — English site, 2026 schedule panel
Confirmed the official English club names; the pre-season games from 21 February to 22 March; both leagues opening on 27 March; interleague play from 26 May to 14 June; the All-Star Games on 28 July at Tokyo Dome and 29 July at Toyama; the absence of any Climax Series line on the page; and the seven Nippon Series dates of 24, 25, 27, 28, 29 and 31 October and 1 November.
https://npb.jp/eng/
Nippon Professional Baseball — spectator contract terms
Confirmed the seven chapters and 17 articles; the formation of the contract on acquiring a regular ticket and the duty to keep and show the stub; the nine grounds for refusing to sell in Article 3, including the two five year periods and the purchase limit; the resale ban in Article 4 and its proviso for non-commercial transfers within a specific relationship; the six categories of prohibited item in Article 5, the guide dog and hearing dog exception, and the baggage inspection power; the eight grounds for refusing entry in Article 6, including noticeable intoxication; the 17 prohibited acts in Article 8; the four kinds of cheering requiring permission in Article 9; the seven grounds for ejection in Article 10 and the clause allowing it to be held over; the refusal of refunds in Article 12; the allocation of risk for home run and foul balls in Article 13, the limitation to direct loss and the spectator’s duty to watch the ball; the exclusive first instance forum in Article 15; and the effective date of 4 February 2010 in Article 16.
https://npb.jp/npb/kansen_yakkan_2025.html
Nippon Professional Baseball — regulations index, contract and rules listing
Confirmed that the listing dates the spectator contract terms as in force from 1 February 2025 and the special cheering rules as in force from 1 May 2026, and that an English version of each is published in the same listing.
https://npb.jp/npb/
Nippon Professional Baseball — rules on permission for special cheering
Confirmed the 12 articles; that only a group may apply; the nine items on the application form including the roster of members’ names, addresses and contact details; the written undertaking covering the Article 3 grounds, observance of the rules, not supporting more than one club and acting as a model cheering leader; the twelve disqualifying grounds; permission being granted for a specified period within a single championship season; the statements that the decision rests on free discretion, that nobody has a right to permission, that no reasons are given and that no objection may be raised; and the power to set aside a seating area and permit the instruments, banners and designated methods there.
https://npb.jp/npb/kansen_kitei_20260501.html
Nippon Professional Baseball — heat illness guideline dated 2 July 2026
Confirmed the four sections; the wet bulb globe temperature measured on the ground by the home club and the 28 degree threshold; the spectator measures covering the air conditioned first aid room, drink outlets, water points, cooled or shaded rest areas, signage, the recommendation to bring drinking water, extra gates, shaded queues and circulating staff and first aid teams; the announcements before the game and between innings after the gates open, and the statement that alcohol increases urine output and does not rehydrate; the statement that whether a game is held rests with the home club; and the closing statement that the risk does not fall to zero.
https://npb.jp/npb/heatillness_guideline_20260702.pdf
Last updated: September 2026
