Yes, a nocebo study did find that rashes could appear on the wrong arm due to suggestion.
As this was a question whose "trail runs dry", I figured I'd give context to how I found it, first, but I have found the study in question, and before I continue, here's the interesting line in the summary at the end:
The effect of suggestion upon the development of contagious dermatitis was proven to be statistically significant at the 0.1% level.
So as I said, before I reference the paper, here's how I found it. First, I went to Google Scholar and did a search using the most important words in the context - Lacquer Tree Nocebo. The first result I found (this was scholar.google.com.au, so it might vary by region) was called "Placebo, meaning, and health", but wasn't available freely... fortunately, the same article was available a few links further down, and the paper in question is here. A quick search found "Lacquer" in a sentence with "46" as a reference number, and in the Reference List, we find
- Ikemi Y. A psychosomatic study of contagious dermatitis. Kyoshu Journal of Medical Science 1962;15:335-50.
Which, given the date of 1962, was clearly going to be the original paper... and indeed, Google Scholar found the article itself, available here.
The full summary at the end says this:
An experimental study on the effect of suggestion on the outbreak of contagious dermatitis induced by wax trees and lacquer trees has been performed with fifty-seven male subjects, aged fifteen to eighteen years.
I: In the leaf-contact experiment, in 13 subjects with "strong reaction" reported on the questionnaire, the definite effect of suggestion was seen in
84.6% of the subjects.
II: In the experimental application of the extract of the poisonous trees in
15 subjects with a "moderate reaction" reported on the questionnaire, the effect of suggestion was seen in 56.2% of the subjects.
III: In the leaf-contact experiment, in the dark room in 5 subjects with "no previous experience" reported on the questionnaire, the effect of suggestion was seen in 40.0% of the subjects.
IV: In the leaf-contact experiment in the dark room and experimental application of the extract with 16 subjects with "no previous reaction" reported on the questionnaire the effect of suggestion was seen in 23.5% of the subjects.
V: In the summary of the results of the above experiments, the reactivity was actually seen in as high as 89.5% of the subjects. In 35.3% constitutional factors seem to play the dominant role with the exception of 2 cases where the effect of suggestion also was distinctly seen. In 51.0%, suggestion clearly predominates over the constitutional factors. The percentage of subjects who showed no reaction to either suggestion or poison was 13.7% (Table 13).
VI: The effect of suggestion upon the development of contagious dermatitis was proven to be statistically significant at the 0.1% level.
VII : The percentage of allergic family history was higher in the group of allergic reaction than in the auto-suggestive group.
VIII: Skin pathology of acute eczema was produced by the conditioning procedure and the histological findings of thus induced skin reaction were proven to be similar to the skin pathology produced by actual contact with the lacquer extract.
Note: I had to manually correct my pdf reader's interpretation of the content (which, among other things, kept interpreting percent symbols as "96", and it saw "III" as "IH"). As such, I may have missed a couple of corrections.
And although it doesn't prove anything, I feel it is worth noting that it is referenced in a number of books on the subject, so I'm assuming that if flaws were found in the experiment, they would be well-known. But I could be mistaken.
The other interesting thing, which isn't in the summary section, is that the control leaf was a Chestnut leaf, and there were two distinct "poisonous" leaves - from the Japanese Wax Tree, and from the Chinese Lacquer Tree.