HAPPY BIRTHDAY by back number
Currently #28 in Japan
Executive Summary
AI-generated performance analysis
Very Good
This song achieves a B+ (Very Good) chart performance rating, currently ranked #28.
"HAPPY BIRTHDAY" by back number demonstrates strong chart presence on Apple Music.
The track has spent 1571 days on the Top 100 chart.
From the album "MAGIC", released Feb 19, 2019.
- Peak: #20
- Current: #28
- 1571 days on chart
- Genre: J-Pop
Key Insights
AI-generated analysis based on chart performance
Exceptional Chart Longevity
With 1571 days on the chart (112.2x the average song), this demonstrates sustained audience interest well beyond typical performance.
Consistent Performance
With a 76/100 stability score ("Stable"), this song maintains a steady chart position, suggesting reliable streaming from a dedicated listener base.
Hot Streak Active
484 consecutive days on the chart (best: 1087) demonstrates sustained listener engagement without any gaps in chart presence.
Chart Performance Factors
Key metrics driving this song's chart success
Chart Performance
Peak position achieved on the charts
- Peak position: #20
- Peak date: May 27, 2026
- Currently ranked #28
Chart Longevity
Total duration on the charts
- 52.4x longer than average song
- 1571 total days on chart
- 1087 max consecutive days
Chart Stability
Consistency of chart position
- Very stable chart performance
- Stability index: 85/100
Current Momentum
Recent chart movement trend
- Stable chart position
- Consistent performance
Solid performance with room for growth in some areas.
Category Benchmark
Performance compared to other charting songs
1.6x higher than avg
52.4x higher than avg
1.7x higher than avg
Strong performance, outperforming most charting songs content.
Chart History & Insights
Performance over time
Currently ranked #28 in the Top 50. Peak was #20. Ranking is stable.
Peak reached on May 28, 2026
Song Preview
Apple Music Reference
Source content being analyzed
0:258HAPPY BIRTHDAY
back number
Daily Rank
#28
Japan
All-Time Rank
#40
Score: 18,160
Peak Position
#20
May 27
Days on Chart
1571
225 weeks
Current Streak
484d
Best: 1087d
Avg Position
#28.3
Last 30 days
7-Day Trend
Stable
Stability
Stable
76/100
in Japan
points
Ranked #40 all-time
About Rankings
Rankings are based on Apple Music Top 100 charts in Japan. Updated daily.
About This Analytics Report
This report is generated by Top1Trend's analytics engine, which tracks Apple Music trending data across 30+ regions since 2024. All metrics are derived from official chart positions via the official Apple Music API.
Top1Trend is an independent analytics service and is not affiliated with, endorsed by, or sponsored by Apple Music. All trademarks belong to their respective owners. Data accuracy depends on platform API availability and may have slight delays from real-time values.