B
Evidence Grade B
Graded
accuracy verified by the review judge
Safe to Cite
Current
89.6%
89.6% -- share of smartphone users reporting hand pain or fatigue for Japanese smartphone users (2026)
89.6% of regular smartphone users surveyed in Japan reported experiencing pain, fatigue, or discomfort in their hands during daily use.
Attribution:
View source
Lighthouse Research Team
Last verified:
·
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Source verified
Evidence graded
Value
89.6%
Unit
Percentage
Data Vintage
2026
Entity
Sample Size
500
Evidence Quality
B
Strong, reliable evidence
Sourced from a well-regarded research firm or industry leader with transparent methodology and a reasonably large sample.
Single source - not yet corroborated
Score breakdown
Extraction
75
Source Trust
60
Citation Chain
20
Independence
30
Methodology
60
Freshness
95
Source
SPRASANN LLC
Primary
Tier B
https://amzeal.com/doc/japans-patented-hammockn-smartphone-band-targets-amzeal-10620250 ↗
Source Article
Amzeal News - Japan's Patented "Hammock'n" Smartphone Band Targets Hand Fatigue From Long Phone Use
Original Research
SPRASANN LLC
· Original study ↗
Methodology
User research survey conducted in Japan by SPRASANN LLC (n=500); cited in product launch press release
Methodology documented
Segmentation
Industrymarketing
Cite this stat
Plain Text
Japanese smartphone users: 89.6% share of smartphone users reporting hand pain or fatigue. Source: SPRASANN LLC (2026). Via Lighthouse Intelligence -- https://lighthousedata.io/data/japan-smartphone-hand-fatigue-survey-2026
HTML Embed
<blockquote cite="https://lighthousedata.io/data/japan-smartphone-hand-fatigue-survey-2026" style="border-left:3px solid #2563eb;padding:12px 16px;margin:16px 0;font-family:system-ui,sans-serif;background:#f0f4ff;"><strong>89.6%</strong> -- share of smartphone users reporting hand pain or fatigue for Japanese smartphone users<br><small>Source: SPRASANN LLC (2026) · <a href="https://lighthousedata.io/data/japan-smartphone-hand-fatigue-survey-2026" target="_blank" rel="noopener">Lighthouse Intelligence</a></small></blockquote>
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