Skip to main content
NOPE
Low reported severity

First-person account: traveller in Japan says an AI-built itinerary listed a Naoshima ferry time with no sailing, costing them a timed museum entry

In a post on note.com dated 29 October 2026, a traveller writes that they planned a two-night solo trip to Kagawa, Okayama and Naoshima with an AI tool, which produced an itinerary in two or three exchanges. Following it, they took a taxi in a hurry to Takamatsu port, where staff told them there was no ferry at the time the AI had put in the itinerary. They say they were held at the port for more than an hour and a half and, unable to move their Chichu Art Museum reservation, made a month earlier, to another slot that day or the next, cancelled it. They then checked every time in the itinerary against official websites. They write that they share the blame for leaving the checking to the AI and expect to keep using it for ideas. The post does not name the AI tool or give the trip date.

AI system
Unidentified chatbot
Occurred
Event date unknown
Reported
29 October 2026
Event location
Japan
What the AI did
Communicated with the person
Reported harm
Other Material Harm
Whose AI use
Their own AI use
Setting
Everyday life
Evidence
AI involvement reported · Causal attribution alleged · 1 source
4 claims: 4 reported. 3 open questions
People reported harmed
1 person

AI system as recorded: An AI tool the traveller used to plan their itinerary in conversation; the post does not name it

Reported harm

The traveller says they were stranded at Takamatsu port for more than 90 minutes because the AI itinerary listed a ferry that did not run at that time, and had to cancel a museum reservation they had made a month earlier.

How Harm Occurred

By the traveller's account, the AI-built itinerary scheduled a Takamatsu to Naoshima ferry at a time when no ferry ran. Acting on it, they rushed to the port, waited more than 90 minutes for the next sailing, and the delay made their timed museum entry impossible to keep.

Outcome

Unknown
  • 29 October 2026: the traveller published their account on note.com, advising readers to check ferry times on official websites.
  • No response from an AI provider, the ferry operator or the museum is described. Two reader comments read on 31 October 2026 concern other parts of the trip.

What remains unknown

  • The trip dates; the post, dated 29 October 2026, gives only that the ferries they later took ran on a Friday and a Saturday.
  • Which AI tool they used and the exact itinerary it produced.
  • Whether the reservation fee was refunded.

What the evidence supports

AI involvement: reported. The traveller writes that an AI tool built their itinerary in conversation and that it placed a Takamatsu to Naoshima ferry at a time when no ferry ran. They say they followed it, waited more than 90 minutes at the port and, as a result, cancelled their timed museum entry. The tool is unnamed and the itinerary text is not reproduced, so the AI output rests on their account.

4 claims: 4 reported. What the statuses mean

Reported The traveller writes that they used an AI tool to plan a two-night solo trip to Kagawa, Okayama and Naoshima, and that two or three exchanges produced an itinerary in about ten minutes.

Causal attribution. The author's own account.

  • note.com(opens in new tab) supports · Japanese
    今回の香川・岡山・直島への二泊三日のひとり旅。; 旅のプランニングには、AIを活用してみました。; ２、３往復AIと会話して、ほんの10分程度で見事な旅程が組まれました。
Reported Following the AI-built itinerary, they say, they took a taxi in a hurry to Takamatsu port, where there was no ferry at the time the AI had put in the itinerary, and they were held at the port for more than an hour and a half.

Causal attribution. The author attributes the missing sailing to the itinerary's time; the itinerary text itself is not reproduced.

  • note.com(opens in new tab) supports · Japanese
    AIが作った旅程に従って、おすすめされたとおりにタクシーで急いで高松港へ。; いや、正確には、AIが旅程に組み込んでいた時間にフェリーがなかったのです。; 結局、1時間30分以上も高松港で足止め。
Reported They write that the delay affected their Chichu Art Museum reservation on Naoshima, made a month earlier; with no free slot later that day or the next day, they cancelled it.

Causal attribution. The author's own account of the consequence.

  • note.com(opens in new tab) supports · Japanese
    しかも、1か月前から予約していた直島の地中美術館にも、この時間のズレが響いてきます。; 美術館の予約時間をずらそうにも、翌日に変更しようにも、空きがない。結局、予約をキャンセルし、今回は行けないことに。
Reported They then checked every time in the itinerary against official websites, write that they share the blame for leaving the checking to the AI, and says they expect to keep using AI for trip ideas.

Causal attribution. The author's own assessment; kept as counterevidence on causation.

  • note.com(opens in new tab) supports · Japanese
    AIが作った旅程の時刻を、ひとつずつ公式ホームページで確認し直すことに。; もちろん、AIが悪いというより、確認を任せきりにした私にも問題があったわけで。; きっと今後も使うと思います。

Sources

1 source inspected. Sources that repeat one account do not corroborate each other.

How the sources were read, and where the events happened

Read in full in Japanese on 2026-10-31 (HTTP 200; bodies/note-com-lagomstyle-n-n772da66d4a6c.txt); publication time 2026-10-29 09:42 JST and the two reader comments with the author's reply read through the note.com API (bodies/note-api-n772da66d4a6c.json). Translated by the research agent (an AI); no human translator. Applies to s1.

Event countries: Japan. Affected-person countries: Japan. Court countries: Unknown.

The post places the stranding at Takamatsu port (Kagawa) and the cancelled reservation at the Chichu Art Museum on Naoshima, both in Japan, where the traveller was at the time. Their residence is not stated.

Reviewed for publication 2026-10-31: Published as a core first-person case (communicated_with). The traveller says an AI-built itinerary gave a ferry time with no sailing, that following it left them waiting over 90 minutes at Takamatsu port, and that they had to cancel a museum booking. The account is single-source and they share the blame for not checking.

People described

A traveller on a solo trip in Kagawa and Okayama prefectures and Naoshima, writing on their own blog (age not stated).

People reported harmed in this case

1 person

1 AI participant · 0 other people harmed

One person: the traveller, who used the AI tool themself.

Counted once within this case. The same person may appear in other cases. This count does not establish AI causation.

Tags

#first-person#note-com#travel-itinerary#ferry#japan

Cite this case

Compiled per our published methodology: verification statuses, sourcing standards, and corrections process.

APA

NOPE. (2026). First-person account: traveller in Japan says an AI-built itinerary listed a Naoshima ferry time with no sailing, costing them a timed museum entry. AI incidents. https://nope.net/incidents/2026-kagawa-traveller-says-ai-built-itinerary-listed-nonexistent-naoshima-ferry-time-museum-booking-lost-first-person

BibTeX

@misc{2026_kagawa_traveller_says_ai_built_itinerary_listed_nonexistent_naoshima_ferry_time_museum_booking_lost_first_person,
  title = {First-person account: traveller in Japan says an AI-built itinerary listed a Naoshima ferry time with no sailing, costing them a timed museum entry},
  author = {NOPE},
  year = {2026},
  howpublished = {AI incidents},
  url = {https://nope.net/incidents/2026-kagawa-traveller-says-ai-built-itinerary-listed-nonexistent-naoshima-ferry-time-museum-booking-lost-first-person}
}

Related cases

Low Unidentified chatbot

Rescuers say a man who followed an AI app's suggested route up an undeveloped peak near Hangzhou fell, was stranded at night and had to be rescued

On the evening of 12 August 2026 rescuers were called to Tonggongjian, a peak of about 1,558 metres in the undeveloped mountains of Lin'an district, Hangzhou, where a man who had climbed alone had fallen and was stranded at about 1,300 metres. A volunteer rescue team with police and firefighters, and in the fire service's account its firefighters, found him after more than an hour, with abrasions, and escorted him down. Dushi Kuaibao's report of the rescue says the man had argued with his wife, asked an AI app on his phone where to go, and that the app asked about his state of mind, personality, height and fitness before recommending Tonggongjian; the fire service's account says it suggested he go there to watch a meteor shower. The rescue team said he rarely hiked, wore flat skate shoes and carried only a folding stool, and that the recommendation gave no advice on equipment. The app is not named and the exchange is not published.

Low Unidentified chatbot

Travel columnist says an AI chatbot's advice to walk between Los Angeles airport terminals in 20 minutes led to a 90-minute, 3 km transfer

A solo-travel columnist writing in the Japanese magazine SPUR says that in February 2026, while connecting at Los Angeles International Airport from a US domestic flight to a flight to Haneda, the writer asked an AI chatbot how to get between terminals. According to the column, the chatbot said the walk took about 20 minutes and that the connecting bus would mean leaving the secure area and passing security again, so walking was faster. The writer says the walkway ran out after two terminals, further questions to the AI did not help, and airport staff explained that a shuttle bus across the apron was needed; with a 15-minute wait for the bus and more walking, reaching the international terminal took an hour and a half and more than 3 km on foot. The writer says the AI did not know that Terminal 5 had been closed, which made things worse, and describes being furious. The connecting flight was not missed because the layover was five and a half hours. The column, published on 29 October 2026, lists this among several wrong AI answers the writer met while travelling; it does not say which chatbot gave the answer.

Low Unidentified chatbot

Tourist reportedly paid nearly $160 to reach a rural road near Mollepata for a 'Sacred Canyon of Humantay' that a trek operator says does not exist

BBC Travel reported on 29 September 2025 that a trek operator in a rural Peruvian town overheard two unaccompanied tourists planning to hike alone to the 'Sacred Canyon of Humantay'. The operator says the tourists showed the operator a screenshot of a confident, adjectival description, that no such canyon exists, and that one tourist paid nearly $160 to reach a rural road near Mollepata without a guide or a destination. The article implies an AI chatbot as the source of the description but does not name the tool used by these tourists, and gives no date.

Medium Unidentified website-generation tool

Japan: police say two teenagers used generative AI to build a fake payment-service site that took women's details, later used to pay for a hotel and consoles

Shiga prefectural police sent two teenagers' cases to prosecutors on 27 October 2026 on suspicion of violating Japan's unauthorised computer access law. According to the police announcement as reported by the Yomiuri Shimbun and Asahi Broadcasting (ABC), on 13 September 2026 the two, in Tokyo, sent two women the URL of a site made to look like a real payment service, told them they could receive money, and had them enter details such as email addresses and phone numbers. Police say the two used generative AI to make the phishing site, and the Yomiuri reports that one of them, who is believed to have used generative AI to make the fake site, said he did not have the skill to build a site without AI. The same day, police say, they logged into a travel-booking site with one woman's details and paid a Tokyo hotel bill of 182,830 yen; they were later re-arrested over three portable game consoles bought with another woman's account. Police believe they took about 50 people's information, including from other payment services, and charged about 5 million yen. Both admitted the allegations, according to the police. They are not named here.

If you or someone you know is struggling, free and confidential support is available. Find a helpline near you at Signpost.

Back to all incidents