What is the definition of TRP? How is it calculated? How is it different from GRP?

Update date: 2024.03.21 Column

TRP is an abbreviation for Target Rating Point, which means "total target audience rating." It is generally called TRP, but some people call it TARP (Target Audience Rating Point). TRP and TARP are the same word.

GRP is calculated based on "households"Unlike the GRP system, the calculation standard for TRP is individual and limited to advertiser targets. Starting in April 2018, the purchase of spot commercials in the Kanto region will be carried out in TRP units instead of GRP units. As this will gradually spread nationwide in the future, it is highly likely that it will become a more important concept than GRP.

From those who don't even know what TRP is to those who want to know what has changed and what will remain the same, I would like to write this article to answer all the questions you may have about TRP.

table of contents

TRP for Busy People
Definition of TRP
How to Calculate TRP
Difference Between GRP and TRP
The total amount has increased due to time-shifted viewing rates?
Summary

TRP for Busy People

TRP is an abbreviation for Target Rating Point, and means "total viewership rating of the target." It is different from GRP because it is data based on individual viewership rating. Each "target" has the following name.

	12 and under	19 and under	34 and under	49 and under	Over 50 years old.
Male	C (child) layer	T(teen) layer	M1 layer	M2 layer	M3 layer
Female	C (child) layer	T(teen) layer	F1 layer	F2 layer	F3 layer

Since the numbers are different between TRP and GRP, if the purchase criteria changes from GRP to TRP,Total cost of TV commercialsThis does not mean that the cost will increase. In conclusion, the total cost will remain the same, but the unit price will change. For companies targeting the M1 and F1 demographics, the unit price will increase, while for companies targeting the M3 and F3 demographics, the unit price will decrease. The main reason for this is that the majority of households that watch television are relatively elderly.

Definition of TRP

TRP is an abbreviation for Target Rating Point, meaning "total target viewership rating.""Target" is by age and genderThey are classified into eight categories, as shown in the table below.

	12 and under	19 and under	34 and under	49 and under	Over 50 years old.
Male	C (child) layer	T(teen) layer	M1 layer	M2 layer	M3 layer
Female	C (child) layer	T(teen) layer	F1 layer	F2 layer	F3 layer

Originally, it was an important indicator when purchasing time slots, but not when purchasing spot slots. The trading volume of spot slots was larger, and purchases were based on GRP, so many companies did not place much importance on it. However, from April 2018, the purchase of spot slots in the Kanto region was changed to TRP-based, and it will become an important indicator for all companies that are running TV commercials or considering doing so.

How to Calculate TRP

TRP is the total individual viewer ratings of the target demographic. GRP can be calculated by adding up the viewer ratings of commercials aired within a certain period of time. For example, let's consider the following situation.

The ad airs once a day from Monday to Friday.
What is the target demographic individual viewer rating for each commercial broadcast time slot (minutes)?
The results were 5%, 5%, 10%, 10%, and 8%.

The TRP during this period is 28% (5% + 5% + 10% + 10% + 8%).

Difference Between GRP and TRP

As already mentioned, the difference in definition isGRP is the household viewership ratingThe difference is that TRP is calculated based on individual viewer ratings. So what is the difference? The key to understanding this is the "population composition ratio." According to population estimates surveyed by the Ministry of Internal Affairs and Communications, the male and female populations are as follows (unit: thousands of people).

	Female	Male
20-34 years old	9,588	10,043
35-49 years old	13,226	13,557
Over 50 years old.	31,713	26,993

Although these figures are for the whole country, the composition ratios vary greatly. The F3 group is about three times as numerous as the F1 group.

In this case, if we assume that the F1 to M1 demographics in one household are in the same ratio, the number of viewers will be in the same ratio. If 3 GRP is purchased for 1 yen, for a company targeting the F10 demographic, that 3 yen means that 10% of the population aged 50 and over is watching.

On the other hand, even if 1 GRP is purchased for the same 10 yen, for a company targeting the F1 demographic, 10 yen means that a program is viewed by 20% of the 34-1 age group. Therefore, for companies targeting younger generations, the (apparent) unit cost to be viewed by one target person increases, while for companies targeting older generations, the unit cost decreases.

However, in reality, the final amount you pay is the same, so in that respect nothing has changed from before.

The total amount has increased due to time-shifted viewing rates?

However, from April 2018, not only the real-time viewership ratings, but also the time-shifted viewership ratings when programs (TV commercials) are watched on a recording device, etc. will become TV stations' "inventory," so the reality is that some of the TRPs purchased will be used up.

Therefore, if we assume that there is no advertising effect in the time-shifted viewing rate, a large amount of advertising will be required to achieve the same advertising effect as before, and if we assume that the advertising effect is large in the time-shifted viewing rate,A small advertising budget is needed to achieve advertising effectiveness through TV commercialsThis will be all you need.

We won't know for sure until we actually see the movie, but as a viewer, I have a feeling it will be the former (this is my personal opinion).

Summary

We have discussed TRP, its definition, calculation formula, and how it differs from GRP.

TRP was not so important when purchasing only spot commercials, but from April 2018, it will be used in the Kanto region and nationwide from now on.CM purchaseThere is no doubt that this will be done through TRP, so I think it will be important to correctly understand its definition and conversion formula.